描述
PS130/6-75-P
上世纪80年代至90年代中期,是PLC发展最快的时期,年增长率一直保持为30~40%。在这时期,PLC在处理模拟量能力、数字运算能力、人机接口能力和网络能力得到大幅度提高,PLC逐渐进入过程控制领域,在某些应用上取代了在过程控制领域处于统治地位的DCS系统。PLC具有通用性强、使用方便、适应面广、可靠性高、抗干扰能力强、编程简单等特点。PLC在工业自动化控制特别是顺序控制中的地位,在可预见的将来,是无法取代的。从结构上分,PLC分为固定式和组合式(模块式)两种。固定式PLC包括CPU板、I/O板、显示面板、内存块、电源等,这些元素组合成一个不可拆卸的整体。模块式PLC包括CPU模块、I/O模块、内存、电源模块、底板或机架,这些模块可以按照一定规则组合配置。CPU是PLC的核心,起神经中枢的作用,每套PLC至少有一个CPU,它按PLC的系统程序赋予的功能接收并存贮用户程序和数据,用扫描的方式采集由现场输入装置送来的状态或数据,并存入规定的寄存器中,同时,诊断电源和PLC内部电路的工作状态和编程过程中的语法错误等。进入运行后,从用户程序存贮器中逐条读取指令,经分析后再按指令规定的任务产生相应的控制信号,去指挥有关的控制电路。CPU主要由运算器、控制器、寄存器及实现它们之间联系的数据、控制及状态总线构成,CPU单元还包括外围芯片、总线接口及有关电路。内存主要用于存储程序及数据,是PLC不可缺少的组成单元。
产品承诺:
保 证 全新原装进口,
保 证 安全准时发货,
保 证售后服务质量,
优势价格,大量现货。
主营DCS系统配件
机器人系统配件
大型伺服系统配件
品牌:ABB ,AB ,GE,FOXBORO,本特利,英维思,伍德沃德,西屋,瑞恩,施耐德,西门子,摩托罗拉,安川。力士乐。ACSO,横河等进口品牌。 专业销售进口DCS PLC系统备件模块
Triconex Siemens Yaskawa ABB GE Ovation AB Foxboro Motorola Schneider XYCOM KUKA 专业销售进口DCS PLC系统备件模块 15天包退换 一年质保 大量现货 国内实力库存商家
Welch Direct Drive Vacuum Pump 8917 A 8917A
Welch Gem 8890 Vacuum Pump
Welch 1.5 Directorr 8905 Vacuum Pump Rotary Vane 8905A
LEYBOLD TURBOVAC 50 and CONTROLLER
BUSCH SV1025C000IKVX VACUUM PUMP .90KW 230/460 3 Phase
Edwards 6 CH Active Gauge Controller and Pirani Gauge
Welch Two Stage Duo Seal High Vacuum Pump 1402 5.6 CFM
MDC GV 4000v-P Gate Valve
Conflat High Vacuum Gate Valve
LEYBOLD PUMP D60AC Repair/Exchange
TURBINE INDUSTRIES VACUUM PUMP
METRO LINE ML-1000 OIL CHANGE CART
CTI Cryogenics Cryo Torr 8F High Vacuum Pump
Vane Set: Becker 10 HP DTLF-250 dry vacuum pump DTLF250
SURGE SP22 MILKER MILKING MACHINE VACUUM PUMP
SURGE SP22 MILKER MILKING MACHINE VACUUM PUMP
ALCATEL MDP 5011 CERAMIC MOLECULAR DRAG PUMP 7.5 LPS
Alcatel 2007 220VAC Vacuum Pump
Edwards HIGH VACUUM PUMP E2M-1.5 ROTARY VANE TWO STAGE
Edwards E2M2 Rotary Vane Vacuum Pump 2.0 CFM
Leybold D4A Trivac Vacuum Rotary Vane Pump
Edwards 12 E2M-12 Rotary Vane Mechanical Vacuum Pump
PRECISION SCIENTIFIC VACUUM PUMP MODEL 10985
One-day shipping available
Granville-Phillips Model: 307005 Vacuum Controller
EDWARDS E2M2 VACUUM PUMP (Internal # 7)
Vacuubrand ME 2SI ME2SI Diaphragm Vacuum Pump
Edwards E2M5 High Vacuum Pump Lab Pump
Pfieffer Balzers UNO 016B Vacuum Pump
Alcatel B0036FGC2A2 Vacuum Pump
NEW Edwards RV3 Dual Stage Vacuum Pump 2.3 cfm
New Cost is Over $2300. Rebuilt RV3 pumps cost $1400.
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MILLIPORE IntelliFlow, N2 and SIH4 Used lots of 2
Leybold D90 D90A Trivac Dual Stage Mechanic Vacuum pump
Vacuubrand© Vacuum Diaphragm Pump
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Welch/Thomas Dry vane Rough Vacuum Pump
Fife Hydraulic Pump
MKS Vacuum Gauge Controller
LEYBOLD HERAEUS SAMPLE LOCK DRIVE UNIT 86 29 14
SVG90 Electronic Cabinet spare parts
Alcatel BF ADP 81 Vacuum Pump
Leybold-Heraeus Trivac D60AC Rotary Vane Vacuum Pump
2 Edwards Vacuum Pump Inlet Chem Filter ITC 20 A4441000
LH MSV 200 59 953 Vacuum pump ion gun control Module?
Matrx 1HP dental Vacuum pump “Cartridge” REBUILT WARR
MAXIMIZER Fits dual pump Core Exchange needed
Vacuum Pump 1 HP 115/230 V /Apollo-Midmark/
Matrx MiniMizer 1HP Dental Vacuum Pump 230V Freestndg
6 Month Warranty *$100 DISCOUNT w/ core exchange*
3.5hp Regenerative Blower 206cfm Vacuum 75″H2O bearing?
Alcatel 2002A Mechanical Vacuum Pump with solenoid valv
Gomco Optivac Vacuum Suction Aspirator Pump S 178
5-station Vacuum Pump Power Control switch and relay bx
CTI-CRYOGENICS SC Helium Compressor Cryo Vacuum Pump pa
USED: Sargent Welch vacuum pump, model 8806, driven by
USED: Sargent Welch director vacuum pump, model 8821A,
Perkin Elmer PVD 4400 Sputter Chamber Liner, very clean
MDC Vacuum Products e-vap Sweep Controller PSC
ALCATEL ROOTS VACUUM PUMP MIV350 – REFURBISHED
PYREX DIFFUSION VACUUM PUMP NEON SIGN PLANT EQUIPMENT
OTHER DIFFUSION PUMPS & OPTIONS AVAILABLE – CONTACT US!
VACUUM MANOMETER MKS 122BA-00100EB ( 100 TORR )
Asyst SMIF-300FL Load Ports for Front End Interface
welch vacuum pump 1380, REBUILT
Vane Set fits Hill-Rom RC-0250B Vacuum Pump RC0250B
Vacuum Pump Direct Drive
BOC EDWARDS NRYOKT000 QDP VACUUM PUMP INSTALL KIT
Rotary Vane Oil Vacuum Pump with belt WSVP-9018 NIB
Vacuubrand MZ2C Diaphragm Vacuum Pump 2.0 m3/h 9.0 mbar
Ryobi / Itek Vacuum Pump 5290-16-215
One-day shipping available
MKS Baratron Transducer 100 Torr 122A-11414 refurb
Mercedes Vacuum Supply Pump for central locking system
W210 E300D E300DT E320 E430 E420
One-day shipping available
Mosier NorGren Smart Vacuum Pump VMS-2110-120 USED
One-day shipping available
Leybold D25BCS
LAMSON 15 H.P. BLOWER / VACUUM
BECKER DVTLF250 VACUUM PUMP, USED TAKE OUT
BALZER 24″ RT ANGLE VACUUM VALVE
Pfeiffer Balzers TPU 170 Turbo Pump Rotary Vane
Croll Reynolds Evactor Air Pump Vacuum CR43
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USED: Edwards Speedivac high vacuum rotary pump, model
Welch 1399B-01 Vacuum pump w Emerson 555NXMPF-C788
NEW BARODYNE VACUUM PUMP 4314-200-3T
NC Nor-Cal Intellisys IQ 4″ Exhaust Throttle Valve
Aera MFC TC FC-980C, SiH4 1 SLM with Calabration SHEET
Leybold D1.6B Refurbished Vacuum Pump
VARIAN 0781 500CC 240V DIFFUSION PUMP
10 hp Busch Vacuum Pump W/ Baldor Motor Parts Unit
BECKER VACUUM PUMP VT 4.25 VACUUM 850 MBAR
Perkin-Elmer Vacuum Ion Pump PE-60
One-day shipping available
Varian 1000L/S Ion Vacuum Pump Leybold
WORKING KNF LABOPORT 400-1901 VACUUM PUMP
Savant VP-190 Two Stage Vacuum Pump 1/2 HP Rotary Vane
BECKER VTC ROTARY VANE VACUUM PUMP / GAS FILTER / HOSE
PFEIFFER TCP 015 PUMP CONTROLLER TURBO VACUUM/ WARRANTY
CENCO LAB VACUUM PUMP
3 AMAT 0010-09337, 5000 CVD 200MM LAMP MODULE
MICE BUUSCH GD12 VACUUM PUMP 3/4HP 7.5CFM
Vanes fit Becker VTLF250 Vacuum Pump PN 901367 (5)
Vanes fit Becker VTLF360 Vacuum Pump PN 901367 (5)
Vanes fit Becker DTLF360 Vacuum Pump PN 901367 (5)
Vanes fit Becker DVTL360 Vacuum Pump PN 901367 (5)
Vanes fit Becker DVTL250 Vacuum Pump PN 901367 (5)
Aera MFC FC-D980C, SF6 300 SCCM looks very clean in box
SUTORBILT ROTARY POSITIVE DISPLACEMENT BLOWER 5H1F
Unit MFC 8565C, N2 750 SCCM NEW with calibration form
LEYBOLD 361C TURBOVAC 361-C TURBO PUMP 85675 / REPAIRS
Mercedes Vacuum Pump Central Locking
Expedited shipping available
Edwards E2M1.5 Rotary Vane Vacuum Pump 230v NEW (Q76)
Nash Vacuum Pump
Leybold Turbotronik NT 150/360 Turbo pump controler
WELCH 1397 VACUUM PUMP DUO SEAL
Varian Vacuum Research Chamber ASA 400 Gate Valve MDC
Cyro Vacuum Pump Compressor Air Product 1R02W
STEC MFC SEC-4550, O2, 50 SLM, looks clean
STEC MFC SEF-8460SL, N2, 50 SLM, looks clean
cold trap LN2 MDC 8 inch DFT-8400-2LN
MKS baratron 127AAX-000100T, 10 TORR lots of 2
MKS baratron 124AA-00010BB, 10 TORR, lots of 2
STEC 4.0g/min TEOS LFC LF-410A-EVD
Sorensen power supply, DCS80-13E, 0-80 V, 0-13 A, used
Welch 1399 Dou-Seal Vacuum Pump Belt Fed GE Motor
Leybold EcoDryL Vacuum Pump 1.5 KW 12315 28cfm rebuildr
LEYBOLD ION PUMP IZ80 85125 NICE
(4379-110) Grundfos CR-8 Multi-Stage Pump, new
VACUUBRAND ME4SI/3,7 DIAPHRAGM VACUUM PUMP
VACUUBRAND ME 4 DIAPHRAGM VACUUM PUMP
Robinair Cool Tech High Performance Vacuum Pump 10CFM
Cool-Tech 10CFM Vacuum Pump International 2-Stage NEW!!
Selection Pfeiffer Balzers Duo 016B 012A Vacuum Pumps
Huntington Electrical Positioning Flange Actuator Valve
KNF NEUBERGER VACUUM PUMP CONTROLLER PU 843-N820.0-1.97
One-day shipping available
High Vacuum Pump-3CFM-110V Mechanical / Air Conditioner
Oil Separator Filters fit Leybold SV.630 vacuum pump
Oil Separator Filters fit Leybold SV.630F vacuum pump
Oil Separator Filters fit Leybold SV.750 vacuum pump
Becker SV 5.330/2 Blower Vacuum Pump ExcellentCondition
ALCATEL 2004A ROTARY VANE VACUUM PUMP – REFURBISHED
Rebuild Kit for Busch RA 0165D 0165 pump PN 993.908.852
Rebuild Kit for Busch RA 0205D 0205 pump PN 993.908.852
ULVAC Rotary Oil Vacuum Pump D-240DK _ Motor EFOUP K
Pfeiffer Balzers Turbo Pump TPH170
Varian EX9296012 MultiVac Ion Pump Controller
One-day shipping available
VACUUM CRYSTAL ION GAUGE ALCATEL AHC 2010-SP/N25 – NEW
Oil Separator Kit fits Travaini PVL 70 vacuum pump
Oil Separator Kit fits Travaini PVL 50 vacuum pump
Oil Separator Kit fits Travaini PVL 35 vacuum pump
Oil Separator Kit fits Travaini PVL 25 vacuum pump
EDWARDS E1M18 VACUUM PUMP WOOD LATHE VACUUM CHUCK PUMP
Vacuum Management Smart Pump VMS-2110-120 #11300
CVC Products KS-200 High Vacuum Pump- 460V!
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ORION VACUUM/PRESSURE ROTARY VANE DRY-PUMP CBS-40
Gas ring Vacuum pump / Compressor
YELLOW JACKET SUPERVAC PUMPS 8.0 CFM 2-Stage 115VAC
LEYBOLD TURBOTRONIK NT 1000/1500 TURBO PUMP CONTROLLER
Filter replaces Ingersoll Rand Part Number 1X8288
Vane Set Fits Becker 10 HP Vacuum Pump DVTL-250
VRC 400 – 14 VACUUM PUMP 3 PHASE 230 / 460 VAC
Leybold Heraeus D4 Roughing Pump, Hydrocarbon
V-Tex Rollcam Vacuum Slit Valve 200304-15-0309-01
CTI-Cryogenics Computer Goldlink Support 8113211G001
Leybold Vacuum Rotary Vane Pump D16A need rebuild
Vanes fit Becker VTLF250 Vacuum Pump PN 901367 (5)
HELIX CTI-CRYO ON-BOARD NETWORK TERMINAL 8113161G003
HELIX CTI-CRYOGEN ON-BOARD NETWORK TERMINAL 0190-27353
CTI-CRYOGENICS RET ROFIT INTERFACE 8115266G001
Edwards QDP Vacuum Pump Gas Module A528 05 000 working
Fischer Scientific D4A Maxima Vacuum Pump, Rotary Vane
Alcatel IPUP Dry Vacuum Pump A100L not working
Alcatel IPUP ADP 100L Vacuum Pump not working
VAT Pendulum Valve 16546-PA21-AAE1/0083 untested
Varian MultiVac Ion Pump Controller 929-6004 working
Vane Set: Busch RC-0630 Vacuum Pump RC6300 722.455.00
HVA Vacuum Pneumatic Gate Valve 11212-0203R
VAT Slit Valve 0210-BA24-1008 working
MKS Exhaust Throttle Valve 653B-13064 working
Alcatel IPUP Vacuum Pump ADP 100L not working
Complete Filter Kit to fit Rietschle Pump: CLF 341
Leybold Turbotronik Turbopump Controller NT 341MT
EDWARDS E2M12 Vacuum Pump
Edwards E2M12 Two Stage Vacuum Pump
Fomblin reclaimed 25/6-14/6 Vacuum Pump Oil – Gallons
Professionally Reclaimed by Kurt J. Lesker Company
Gomco Model 3810 Explosion Proof Surgical Vacuum Pump
Fomblin reclaimed 25/6-14/6 Vacuum Pump Oil – Gallons
Professionally Reclaimed by Kurt J. Lesker Company
Vat Gate Valve, heater, 64248-XE52-1108, Looks clean
WERIE SKG 275 – 2.01 BLOWER 230/460V 3450 RPM 1.8 KW
SIEMENS ELMO-G GAS RING VACUUM PUMP/COMP 2BH1500 1AK12
Barnes/Wisconsin Gas Motor Fuel Pumping Unit QM-2-28002
Becker type D80B4P oil less vacuum pump
Leybold NT 150/360 Turbo Vacuum Pump Controller
LEYBOLD DRYVAC2 PUMPING SYSTEM
VACUUM PUMP VARIAN VacIon 8l/s – NEW
LEYBOLD TURBOVAC 1500C Turbomolecular Vacuum Pump
UNIT UFC-1660 N2, 50 SCCM, lots of 2, used, as is
BECKER VT 3.10 VACUUM PUMP – REBUILT
One-day shipping available
STEC 0.2g/min TEPO LFC LF-310A-EVD
New Becker VT 4.25 Vacuum Pump
Bio Rad Trans Blot SD Vapor Trap Vacuum Pump Pwr Supply
LEYBOLD INFICON QUADREX-100 SCU 901-200-G5 019-101-G2
Turck FCS-G1/4A4-ARX-D118 0.3M Flow Meter/Parker Valves
Ulvac DA-60D Diaphragm Type Dry Vacuum Pump
WORLD CHEMICAL YD-50VK-B-56 TITANIUM SHFT VERTICAL PUMP
Welch 8905A Vacuum Pump
KNF NEUBERGER UN726.3 FTP DIAPHRAGM VACUUM PUMP
Rietschle Thomas Vacuum Pump PICO VLT10 GAST Lebold NEW
Rietschle Thomas Double-stage side channel Vacuum pump
Edwards QDP Exhaust pressure module Series 2 A52856000
Edwards SpeedVac ED 660 Vacuum Pump
Varian 960D INTERNAL VACUUM PUMP ASSY
High Vacuum Pump-3CFM-110V w/ Gauge Mechanical Air
Denley WellWash 4 MicroPlate Washer with vacuum Pump
ALLEN BRADLEY 1305-BA09A 5HP AC DRIVE SERIES C
ION PUMP/VAT VALVE/DIGITEL 500/GETTER PREP *1/2 PRICE*
AB Dick, Multilith, Chief, Davidson Vacuum Pump
Alcatel 2008 AC Vacuum Pump
POLY WATER 2000GAL TANK 13FT TALL 5FT DIA USED GOOD
NEW MKS 624B BARATRON 624 CAPACITANCE MANOMETER 2T AMAT
CVC Vacuum Research Chamber 4 Inch ASA Gate Valve MDC
CTI-Cryo Compressor Absorber “NEW” Vacuum Pump
Alcatel ADP 80 VZ Vacuum Pump
Leybold Turbotronik NT 1000/1500 Pump Controller AMAT
High Vacuum Pump-5CFM-220V
Huntington High Vacuum Research Chamber ASA 600 Varian
CTI CRYOGENICS KEYPAD, FOR ON-BOARD SYSTEM
VAT Insertable Vacuum Chamber SERIE 693 Gate Valve MDC
Alcatel ADP 80 H Vacuum Pump
Alcatel 2021 Pascal 2021CP Vacuum Pump 115V / Warranty
AMAT TURBOTRONIK NT 20 LEYBOLD NT20 PUMP CONTROLLER
THOMAS AIR PUMP AIR VACUUM , 1/3 HP , GH-417B
Gould Nitrogen Test Fixture System with Vacuum Pump
Welch DuoSeal 1/3 Pump Vacuum Pump
Alcatel 2004A Vacuum Pump New
Rigaku Denki Vacuum Pump Model 9017A1
STEC SEC-4550 MFC, N2, 30 SLM, used
STEC SEC-4550 MFC, N2, 30 SLM, used
STEC SEC-4550 MFC, N2, 40 SLM, used
STEC SEC-7355 MFC, Ar, 50 SLM, used
STEC SEC-4550 MFC, O2, 50 SLM, used
AMAT 0010-76968 OTF centerfinder emitter and 0100-76055
USED LEYBOLD TRI-VAC VACUUM PUMP 72075040 D30A 1-1/2hp
Vacuum Power Supply Pump MERCEDES 300SD 300SE 400SE
Expedited shipping available
Vacuum Power Supply Pump MERCEDES 400SEL 500SEC 500SEL
Expedited shipping available
Vacuum Power Supply Pump MERCEDES 600SEC 600SEL CL500
Expedited shipping available
Vacuum Power Supply Pump MERCEDES CL600 S320 S350 S420
Expedited shipping available
Vacuum Power Supply Pump MERCEDES S500 S600 94 95 96-99
Expedited shipping available
ARCO 1 1/2HP VACUUM DUST COLLECTOR PUMP 110V USA
10-Gallon Vacuum Chamber and 6cfm Vacuum Pump (NEW)
Rietschle VLT 15 Vacuum Pumps
MKS 95 mm Control Throttle Valve
Leybold TRIVAC D30A VACUUM PUMP, 26.8CFM 3PH 1.5HP
CVC High Vacuum Ion Pump Test Stand
Inland 19 Vacuum Pump Fluid 55 Gallon Oil
Cardone Industries 64-1309 Vacuum Pump
Cardone Industries 64-1303 Vacuum Pump
Vanes fit Becker DVTLF 250 Combo Pump DVTLF250
Vane Set: Becker VTLF-360 vacuum pump VLTF 360 VTLF360
Vane Set Fits Becker 15 HP DTLF-360 dry vacuum pump
MILKING MACHINE SYSTEM W/ VACUUM PUMP PORTABLE NEW
GOATS AND SHEEP MILKING MACHINES AVAILABLE ON REQUEST!
Inland 77 Vacuum Pump Fluid 55 Gallon Oil
Gast 2567-V107-G471 Compressor/ Vacuum Pump
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Labconco 117 Rotary Vane Dual Stage Adj Vacuum Pump
Vacubrand Type ME 4C Diaphragm Vacuum Pump
Vacubrand Type ME 4C Diaphragm Vacuum Pump
Hitachi Sensaur 4VP-C2 Vacuum Pump
VAT PM-5 Adaptive Pressure Controller, F64-60350-419
1 x 2 – 8 Stainless Steel Centrifugal Pump
DEKKER DURA VANE ROTARY VANE VACUUM PUMP
Varian Triode Ion Pump 30 L/s 9115032 IonVac 911-5032
Varian 9115032 Conflat Flange ( CFF )
One-day shipping available
FOREMOST RAW MATERIAL VACUUM PUMP FULLER VSF-OTA-21
Exhaust Filter Kit 471 / VC-700 Rietschle Beacon MRO
Exhaust Filter Kit 471 / VC-500 Rietschle Beacon MRO
Cardone Industries 64-1301 Vacuum Pump
Cardone Industries 64-1302 Vacuum Pump
Filter replaces Ingersoll Rand Part Number 1X9599
Filter kit fits Leybold SV500 Vacuum Pump
Filter kit fits Leybold SV200B Vacuum Pump
High Vacuum Pump-3CFM-220V Mechanical / Air Conditioner
EDWARDS QMB250F QDP40 VACUUM PUMP MECHANICAL BOOSTER
Vanes fit Rietschle DTA60 Vacuum Pump pn 526886 (6 )
Vanes fit Rietschle DTA80 Vacuum Pump pn 526886 ( 6 )
Vanes fit Rietschle DTA100 Vacuum Pump pn 525977 ( 6 )
Vanes fit Rietschle KTA80 Vacuum Pump pn 526886 (6 )
Leybold EcoDry L Dry Vacuum Pump S309376
MKS Instruments Exhaust Throttle Valve 253B-15186
Nor-Cal Intellisys Pressure Controller 3870-00165
MKS Throttle Valve 683B-23795 working 75mm ISO
VACUUM MANOMETER CMLA-21 (100 Torr) – REFURBISHED
VACUUM MANOMETER TYLAN CMLA-11S02 (10 Torr)
VACUUM MANOMETER TYLAN CMLB-21 (100 Torr) – REFURBISHED
FOREMOST RAW MATERIAL VACUUM PUMP FULLER VSF-OTA-21
EDWARDS 18 VACUUM PUMP
UNIT 1660 UFC-1660 He 10 SLPM with calabration sheet
Novellus Controller I/ 0 Daulcap Firmware Version 4.8
HyVac HyperVac 100 Vacuum Pump (Leybold D4B) Tested OK
WELCH MODEL 1397 DUOSEAL VACUUM PUMP
MASS FLOW CONTROLLER 5877, He, 10 SCCM lots of 2 USED
UNIT MFC UFC-8165, 10L, Gas N2, NEW in box
UNIT UFC – 7000 industrial MFC, H2, 1.00 SLM, NEW
UNIT UFC-1660 CL2 200 SCCM and O2 50 SCCM, lots of 2
Varian 6″ diffusion pump vacuum with cold trap *
Varian 6″ diffusion pump vacuum with cold trap
VACUUM PUMP DIAPHRAGM VACUUBRAND ME 8SI
专业销售进口DCS PLC系统备件模块
PLC模块,可编程控制器,CPU模块,IO模块,AI模块,通讯模块。AB/施耐德/ABB/GE/本特利/西屋/英维斯/霍尼韦尔/黑马/FU克斯波罗
15天包退换 一年质保 大量现货 国内实力库存商家