推送:MTC2000省市縣區(qū)域/直送2026全+境+派+送-非誠勿擾第一百二十六期-乳頭被吸奶器吸疼了怎么辦
- 報價
- 請來電詢價
- 聯(lián)系手機
- 15396092202
- 微信號
- 15396092202
- 品牌
- AB
- 型號
- MTC2000
- 產地
- 美國
福州卓凱電子科技有限公司
主營產品:DCS集散式控制系統(tǒng)、PLC可編程控制器、數(shù)控系統(tǒng)、
(CPU處理器、模塊、卡件、控制器、伺服驅動、工作站、驅動器、
馬達、 內存卡、電源,機器人備件等)各類工控產品
AVAYA S8300D 8GM RAM MEDIA SERVER BOARD SER.4 S8300 350GB HDD
AVTRON A10459 CALIBRATION BOARD MACHC12213
AVTRON A14449 DISPLAY CONTROL BOARD REV. E,90455 , D15757 , A14914
AVTRON A14978 CONTROL BOARD 630110 , MACH.D15985 , W/ 90455 BOARD A14893 B16295
AVTRON A18123-1 REV. E BRIDGE INTERFACE BOARDW/ A18639-1 PC BOARD SNUBBER
AVTRON ASSY. A10405 AMPLIFIERBOARD
AVTRON SUB-ASSY. A 14927 BOARD REV. F. ASSY.630101 REV. A, MACH. D15985
B&R 0AK300.1 PC BOARD ASSEMBLY SERIALINTERFACE VDC 0AK3001
BABCOCK VL-01SP-02 PC BOARD DISPLAY ASSEMBLYPA100081-01 REV. C
BAILEY 6636448B1 ANN DISPLAY SEL BOARD,660-MISC-9621, 6636447B1, R315969
BAILEY CONTROLS 6624280A1 GATE SWITCH LOGICMODULE 6624278 A1
BAILEY CONTROLS 6624705A1 BRC PULSE ANALYZERPULSE DELAY BOARD 6624703-B1 191257
BAILEY CONTROLS 6636780AIH MEMORY ASSY.BOARD
BAILEY CONTROLS 6636896A1 PC BOARD ASSEMBLYNMFC03
BAILEY CONTROLS 6636997A1 COMM LOOP TU6636996C1, NTCL01 NETWORK 90
BAILEY CONTROLS 691314C1 CIRCUIT BOARD691316C1
BAILEY CONTROLS NSSM01 MODULE SUPER LOOPSTORAGE 5-15VDC 27.4VA
BAILEY METER CO. 6618760R2 AC SERVO AMPLIFIERW/ 174355 BOARD
BAILEY NPSM01 NETWORK 90 POWER SUPPLY MODULE120VAC, 50/60HZ, 7.0A
BAILEY NPSM02 NETWORK 90 POWER SUPPLY MODULE120VAC, 50/60HZ, 14.0A
BAILEY PCB 6639571V1 TRANSMITTER PCA6639751F1, 9901003, A17 9904
BAKER INDUSTRIES PM-119 / PM119 PYROTRONICSPOWER SUPPLY 100-009001 / 100009001
BALDOR BSC1105 / ASR31225A AC SERVO DRIVE W/POWER SUPPLY 230VAC 50/60Hz 5A
BALDOR EB0524A00 POWER INPUT BOARD PB0303A00GERB REV. A FAB. REV. A H2
BALDOR RELIANCE / ABB PC20003C-00 REV-F TOPCONTROL DRIVE BOARD PC20003C00
BALDOR RELIANCE CB10003C-04 DBS-001045CONTROL BOARD CB10003C04 PC10003C-00
BALDOR RELIANCE MD-B3011G PC BOARD W/ KEYPADPSBD-9
BALOGH BS-45-AA REV. B SERIAL CONTROL MODULEBS45AA BS-45AA
BANNER BA16S FIBER OPTIC CABLE22319
BANNER D12DAB6FV PHOTOELECTRIC SENSOR39545
BANNERPMA PUSH BUTTON SENSOR12/30VDC, 79032
BANNER M25URP ULTRASONIC SENSOR 12845KRONES EDV-NR. 0901772467
BANNER MIAD9D MINI BEAM SENSOR37714
BANNER Q236E W/30' PHOTOELECTRIC EMITTER10-30VDC W/30 FOOT CABLE 46457
BANNER S18UUA SENSOR02700
BANNERD VALU-BEAM: RECEIVER39554
BANNER SMA30PEL AC/DC EMITTERSENSOR
BANNER T186E SENSOR33420
BARBER COLMAN A-60050-1-1 COMMUNICATIONS PCBBOARD A6005011
BARTON INSTRUMENT SYSTEMS 002NC7 PRIME ANALOGINPUT MONITOR W/ WA20 INPUT MODULE
BAUMER ELECTRIC FZAM-30N5001 PHOTO ELECTRICSENSOR FZAM30N5001, 10-40VDC
BAUMER ELECTRIC FZAM-30N5004 PHOTO ELECTRICSENSOR FZAM30N5004
BAUMER ELECTRIC OADM 20I44/406009A THICKNESSLASER SENSOR
BAUMER FADH 14U4470/KS34A/IO PHOTOELECTRICSENSOR FADH 14U4470KS34AIO
BAUMER FPDK 14P51/509173A / 11001192RETRO-REFLECTIVE SENSOR 4-PIN LED NSMP
BAUMER FPDK 14P5101/S35A / 131261RETRO-REFLECTIVE PHOTO SENSOR W/ FILTER NSNP
BAUMER IFRM 12P1701/S14L / 214930 INDUCTIVEPROXIMITY SENSORS 10-30VDC NSMP
BAUMER THALHEIM, A-NR: 316357, C-NR:09004593-19, ENCODER ITD 27A4Y20, 33.09
BBE LIKA AWC65MTPe.1000/100NS /AWC65MTPE1000100NS ROTARCOD ENCODER 40:1 250mA
BDC BURNER DESIGN AND CONTROLT18U-006-00-8HN31 TEMPERATURE SENSOR ASSEMBLY
BECK 22-4001-04 / 22-4001-02 CONTROL BOARDASSEMBLY MODULE
BECKHOFF CX8190 / 000000800 EMBEDDED PCCONTROLLER MODULE REAL-TIME ETHERNET
BECKHOFF EP2338-0001 EtherCAT BOX 8-CHANNELDIGITAL I/O MODULE 24VDC
BECKMAN 640324 TC BOARDASSEMBLY
BEI 3704CZS-4 SHAFT POSITION ENCODER3704CZS4
BEI 924-01002-3432 ENCODERH25G-SB-2500-ABZC-8830-EM18 5VDC, 924010023432
BEI MOTION H25E-SB-500-ABZ-7406R-LED-EM16-SENCODER 924-01002-212 15VDC IN
BEI MOTION SYSTEMSH25D-SS-1000-ABZC-8830-LED-EM18 ENCODER P/N:924-01002-2480
BEI XH25D-SS-1666-ABZC-28V/V-SM18 /01002-6021 INCREMENTAL ENCODER 5-28VDC USNP
BEI XH25D-SS-2000-ABZC-4469-LED-SM18 ENCODERP/N: 924010027369, VDC: 5-15
BEL MFG. E10159-0 PC CONTROL BOARD 1-0-E
BELLOWS B341-001 CONTROL TRANSFORMER CAT. NO.T12232
BELOIT CUSTOM CONTROLS 42400984-G1 PROCESSCONTROLLER 42400984G1
BENSHAW RS6V-20A-480-C SOLID STATE MOTORCONTROL 480V, 20A, RS6V20A480C
BENTLY NEVADA 23211-01-03-01 PROXIMITOR BOARDA-175-190-15-200-LOW 14612-01
BENTLY NEVADA 72937-01-04-01-01-15 INDICATORBOARD PWB 40437-01 F PWA 72928-02M
BENTLY NEVADA 72937-XX-04-01-XX-XX INDICATORBOARD PWB 40437-01 H PWA 72928-02
BERGES EGKRACKB/D01 CONTROL BOARD 930716 8 ,930714 8 75 , 9110A
BERGES EGKRACKB/D01 CONTROL BOARD 931103 12 ,931103 7 24
BERGES EGKRACKB/D01 PC BOARD 930714 2 75,930716 14
BERGES ELECTRONICS EST/IGBT/E/E18 15KW BOARD960426-2-14, 930630-14, ESTIGBTEE18
BERGES WA11RE/611 POWER BOARD 930628 20 74 ,930630 14 , WA11R/E
BERNARD CONTROLS F04-028-92029 ACTUATORF SF028-4AA4A00AA
BETA PRODUCTS 309159 REV. 001A BETALOG 4100FIBER MUX BOARD
BETA TECH BC-FSC-050-009 I/O MODULE BOARDBCFSC050009
BETA TECH BC-FSC-071-003 SPINDLE CARD MODULEW/ BC-NULL-011-001 PC BOARD
BETA TECH BC-FSC-072-001/BC-NULL-011-001SPINDLE CARD BCFSC072001 REPAIRED
BETA TECH BC-FSC-072-003/BC-NULL-011-001SPINDLE CARD BCFSC072003 REPAIRED
BETA TECH BC-TIB-011-003 BOARDBCTIB011003
BETA TECH INC BC-FSC-050-004 I/O BOARDBCFSC050004
BETA TECH INC. BC-FSC-050-010 CONTROL BOARD110196077 BCFSC050010
BETA TECH INC. BC-NULL-011-001 SPINDLE CARDBCNULL011001
BIHL & WIEDEMANN BWU2270 SAFETY INPUT MODULEIDENT. NO: 12942
BIHLER 122-82-0589 PC BOARD 122820589,PR7-P
BIHLER PR-5007-P MODULE PR5007P, PR-P 5007,PR-P V0004, 122-85-0283.9
BLH ELECTRONICS 02.153.04B CIRCUIT BOARD02.153.04 B
BLH ELECTRONICS 462954 LCI WEIGHT INDICATOR891674 (FOR USE WITH E18688)
BLH ELECTRONICS 465741-3 CONTROL BOARD REV. N465743-3 REV. G 3465-2021
BLH ELECTRONICS T3P1 LOAD CELL CAP.2000LBS.
BOARD 228-24492D
BOBST 704-1091-03 PC BOARD W/ PPI 22-B-7020CONTROL CARD 704109103
BODINE ELECTRIC 0889 / FPM-0889 DIGITALINTERFACE CARD FOR FPM CONTROLS NSMP
BODINE ELECTRIC CO. 43110409KCW CONTROL BOARD43110409 890CYMB0021
BODINE ELECTRIC CO. 43110418KCY SPEED CONTROLBOARD 43130423H
BODINE INTEGRAMOTOR CONTROL PANEL W/22B2BEBL/SR GEAR MOTOR W/CABLES AND CASE
BOMAC ELECTRO FLYTE 12M03-106 CONTROL BOARD8100-0552 REV. C
BORRIES ISE ELECTRONICS BC7 PROCESSOR BOARD73210053 ICS_CPU2 800.0011
BOSCH 9810231273 DIRECTIONAL CONTROL VALVE081WV06P1V1010KE115/60 D51
BOSCH 9810231448 REXROTH DIRECTIONAL CONTROLVALVE 81WV06P1V1033WS024/00D51
BOSCH 9810235625 DIRECTIONAL CONTROL VALVE081WV25P1V310PTKE
BOSCH REXROTH VT-VSPA2-50-10/T5 BOARDLK02912-001 3297 W/ LK02857-001, ZP1-S40
BOSTON / FINCOR 105335101-E RELAY / INTERFACEBOARD REV: H 105335101
BOSTON / FINCOR 105335101-L RELAY / INTERFACEAL BOARD REV: L, 1053352-J
BOSTON / FINCOR 105438101 FIELD CURRENTSENSING BOARD 1900-76
BOSTON / FINCOR 105574201-E KL SNUBBER /TRIGGER BOARD REV: E 105574201
BOSTON / FINCOR 105762309-A INTERFACE BOARDREV. A AL 105762309 (INCOMPLETE)
BOSTON / FINCOR 105762309-E REV. E 0426INTERFACE BOARD PB2 105893101R 105762309
BOSTON / FINCOR 105816403-C BUFFER BOARD REV:C KL 105816403
BOSTON / FINCOR 105816403HM-C BUFFER BOARDREV: C AL 105816403HM
BOSTON / FINCOR 106168601-A LOGIC BOARD REV:A 106168601
BOSTON / FINCOR 106168601HM-B REV. B OL LOGICBOARD 1061687 106168601HM
BOSTON / FINCOR 106261803-B PULSE TACH. BOARDREV: B 106261803
BOSTON / FINCOR 106272301HM-B LINE DRIVERBOARD REV: B KL 106272301HM
BOSTON / FINCOR 106272301HM-C LINE DRIVERBOARD REV: C NN 106272301HM
BOSTON / FINCOR 106275201-B GENI / PULSE TACHBOARD REV. B 106275201
BOSTON / FINCOR 106282101-B HORIZONTAL SWITCHBOARD REV: B 106282101
BOSTON / FINCOR 106282101HM-B HORIZONTALSWITCH BOARD REV: B RL 106282101HM
BOSTON / FINCOR 106282401HM-B VERTICAL SWITCHBOARD REV: B 106282401HM
BOSTON / FINCOR 106286101HM-A STANDBY SWITCHBOARD REV: A 106286101HM
BOSTON FINCOR 104459901 REV-C FIELD REGULATORCONTROL ASSY NO: 104460001 REV. E
BOSTON FINCOR 105335101-L RELAY / INTERFACEIL BOARD REV. L 105335101
BOSTON FINCOR 105762309-C INTERFACE BOARDREV. A AL, 106295901M0S-A V1.5
BOSTON FINCOR 105762309-E INTERFACE BOARDREV. A NL, 106295901M0S-E V1.5
BOSTON FINCOR 106168601HM-D LOGIC CONTROLBOARD REV. D 106168601HM
BOSTON FINCOR 106168601HM-F LOGIC BOARD REV:F 1061687-C 106168601HM
BOSTON FINCOR 106261803-B PULSE TACH. BOARDREV: B 1062753 W/ 105623011 REV: C
BOSTON GEAR DPM35BO CONTROLRATIOTROL
BOSTON GEAR INCOM RATIOTROL 61149 REV. K W/1039486-01 REV G AC CONTROL BOARD
BOSTON GEAR MODEL DPT CONTROLLER PT#:0EMEG001, OEMEG001 REDLION RPM
BRANSON 119-075M PROGRAMMER BOARD119-075
BRANSON 900 MWC MULTIPLE WELDER CONTROLLEREDP NO. 201- VAC 50/60HZ
BRANSON ULTRASONICS 246388 POWER SUPPLY150YKK, 085020, FX50103 - REPAIRED
BRONKHORST CORI-FLOW AGD DIGITAL MASS FLOWMETER/CONTROLLER PCB HOUSING
BROSA EBM 6111 V/3 COMPRESSION LOAD CELL TYPE0101 0-10V 0-50KN EBM6111V3
BURKERT 8031-GS82-THAA-P7-E-F1-U-BDG-DC-Z /783721V TYPE 8031 FLOW SENSOR NSMP
BURTON 513-215-100 PC BOARD PS1100 BRV D DRVC ECI-B-6, 513215100
BURTON 513-326-003 CONTROL BOARD 513326003,REV. 0
BURTON 513-327-000 CONTROL BOARD BRV: P DRV:G RM 1100 513327000
BURTON 513-385-000 FIRING BOARD, 5-000
BURTON 513-630-000 PC BOARD RM 4100,413-099-000
BURTON 513-676-100 CIRCUIT BOARD 3FCTPLD BRVF DRV G ECI-B-6
BURTON 513-676-100 CIRCUIT BOARD 3FCTPLD REV.F, 413-128-100
BURTON EMERSON 513-185-000 RELAY BOARD BRV: BDRV: A
BURTON EMERSON 513-234-000 CIRCUIT BOARD BRV:J DRV: E, 6RL, ECI-B-6
BURTON EMERSON 513-676-000 CIRCUIT BOARD BRV:K, 3FCTPLD, EP-6
BYTE RUNNER TECHNOLOGIES TC-800 ASSY, ELEC8-PORT SERIAL BOARD
CABLETEST HR-LV-SSM REV. 3 BOARD P/N:20-26020, HRZ-LV SC
CABUR XCSL240C / CSL240C SWITCHING POWERSUPPLY 120-230VAC IN 24VDC OUT 10A NSMP
CALTRONICS 64MV407V24 / 64MV504V00 C3 CONTROLBOARD OLEC NSNP
CAMILLE BAUER EMMOD 203 EXPANSIONMODULE
CAROL E18621-7 ENCODER CABLE W/ AMPHENOL10-PIN FEMALE CONNECTOR TO 9-PIN MALE
CCI DCF-R5-0949 CONTROL PC BOARDDCFR50949
CCS INC LFV-CP-18-BL / LFVCP18BL LFV3 SERIESMACHINE VISION BLUE LIGHT 24V NSMP
CD AUTOMATION CD3000-HB,OPTION HB & NFTHYRISTOR CONTROL INPUT: SSR 240V 35A
CD AUTOMATION CD3000-HB,OPTION HB & NFTHYRISTOR CONTROL INPUT: SSR 240V 45A
CEI MODEL 8115 AC ADAPTER BOARD REV. B8115-501
CENTRALP AUTOMATISMES 190622-3/AE BOARD34190006
CGI CIRCUITS PANAMETRICS 710-1141 BOARD703-1141 9815-14 /84948
CHESHIRE 852076 REV. 2 CIRCUIT BOARD982050-03
CHESHIRE 852078 REV. 2 CIRCUIT BOARD982050-05
CHESHIRE 852079 REV. 2 CIRCUIT BOARD982050-06
CHROMALOX 2110-S1000 TEMPERATURE CONTROLLER2110 SERIES 2110S1000
CHROMALOX 3913-20104 TEMPERATURE CONTROLLER391320104
CINCINNATI ACRAMATIC 3 542 1022A CIRCUITBOARD 35421022A REV.A 3-542-1022A
CINCINNATI ELECTROSYSTEMS INC. 600F REV. ACIRCUIT BOARD
CINCINNATI MILACRON 3-531-3316A PC BOARDMODULE 35313316A
CINCINNATI MILACRON 3-531-3418A PC BOARD35313418A REV F
CINCINNATI MILACRON 3-531-4351A PC BOARD HDCO35314351A
CINCINNATI MILACRON INC OC-1 3-542-1060A SRCOPC BOARD 35421060A REPAIRED
CINETIC AUTOMATION AU45RC-40 AXIS CONTROLUNIT A70E3-HX-4200, AU45RC40
CISCO GLC-LH-SMD / GLCLHSMD TRANSCEIVERMODULES 10-2625-01 / 10262501
CISCO SFP-10G-SR / SFP10GSR TRANSCEIVERMODULES 10-2415-03 / 10241503
CISCO WS-X4612-SFP-E V02 CATALYST 450012-PORT GIGABIT MODULE WSX4612SFPE
CISCO WS-X5234-RJ45 24 PORT 10/100TX SWITCHMODULE - SEALED
CISCO WS-X5236-FX-MT 5500 CATALYST SWITCHCARD 5236 FAB# 28-2732-03
CLEVELAND MACHINE CONTROLS TIX-1 TENSIONINDICATOR 115VAC, 0.1AMP, TIX1
CLEVELAND MOTION CONTROL C41-10144K CONTROLBOARD MO-03146-1
CLEVELAND-KIDDER M846-01449-004 UPB-1 LOADCELL 250LBS
CLEVELAND-KIDDER M846-02055-104 LOAD CELLUPB-5 M84602055104
CLEVELAND-KIDDER SC-2T / SC2T Tensi-MasterTENSION TRANSDUCER MWF 150
CMS CABLE MANAGEMENT SYSTEMS CONTROL PANELASSEMBLY, PATCH PANELS
CMS CABLE MANAGEMENT SYSTEMS MODEL P.PANELCONTROL PANEL ASSEMBLY PPANEL
CNC CLEVELAND MACHINE CONTROLS A6483-G01BOARD 237243 REV. H, PC0856 REV. D
CODESYS CPUXMC1-41 / 206229v1 CONTROL BOARDANALOG I/O RS485 USNP
COGNEX 800-5726-1 (D) / 200-0136-1 (C) LIGHTS/ AUX IO VISION CONTROL BOARD USMP
COGNEX 800-5749-1 REV. A VISION SENSORIN-SIGHT 1010 CAMERA W/ COSMICAR LENZ
COGNEX DM260X 1AA0 DATAMAN 260 BARCODE READER825-10346-1R /D W/LDR2-74RD2-LA
COGNEX DVT CON-IBOB ISOLATED BREAK OUT BOARDCONIBOB
COMPA MODEL 4100 CA CONTROL BOARD232650401, 410-0058, SST16X V2
COMPRESSOR CONTROLS 912719/67 / 912719 ANALOG/ DIGITAL FIELD OUTPUT MODULE NSNP
COMPRESSOR CONTROLS CORP. 912718 /67 FIELDINPUT MODULE SP-A/D FIM 91271867 SP-A
COMPTROL SHAFT ENCODER MODEL:CCT960T
COMPUTALOG INC. TPS CVGEN II BOARD ASSY #1000.1388 REV. E 10001388
COMPUTER AUTOMATION 73-53506-00D-37 BOARD W/73-53505-55-G8, 73-53507-00B-19
COMPUTER BOARDS INC. CK-66-0019 RELAY BOARDCOLOR CODED W/ IDC5 IAC24 ODC5 OAC24
COMPUTER DYNAMICS CPU-186 PROCESSOR BOARD,REV D, CPU186
COMPUTER DYNAMICS PIO-48/64-D PC BOARDPIO4864D
COMPUTER OPTICAL PRODUCTSCP550-2048-L-12MM-02 ENCODER W/ CABLE &ACCESSORIES
COMPUTER PRODUCTS 700080-01 POWER BOARD REV.H 510080 70008001
COMPUTER PRODUCTS NFS110-7601 POWER SUPPLYBOARD 100-240VAC 3.0-1.0A 50/60HZ
COMPUTERWISE 8403042 PC BOARD 21002,840304-2
COMPUTROL 30-0020 CARD READER INTERFACE25-0020
CONTEC PCI-212 SRAM-256 (9245B) BOARDPIF-0253
CONTEMPORARY CONTROLS PC970120-00D MODEL:572639-1
CONTRAVES A6358 FIELD SUPPLY BOARD REV. F,PC0808-01 REV. A
CONTRAVES PC0526A CONTROL BOARD ASSEMBLYPC0526
CONTRAVES PC0529A PC BOARDSUPPLY
CONTREX 7300-0982/RK143TC SENSOR KIT73000982/RK143TC
CONTRINEX YBB-30R4-1000-G012 /YBB-30S4-1000-G012 LIGHT CURTAIN SET 24VDC NSNP
CONTROL CHIEF 8002-4002 RELAY BOARD80024002
CONTROL ENGINEERING C1081776 CONTROLLER BOARDC1081740 CCU V1.6 ASSY REV: H.2
CONTROL PRODUCTS DEVAR INC. SERIES 18-112ARESISTANCE TRANSMITTER MOD. A2C-M31
CONTROLUES 82000000013200 /SM-Ethernet EtherNet/IP OPTION MODULE NSMP
CONTROLUES 9200-0135 POWER BOARDMODULE 95300-R2, MD-21, 571-565-040
CONTROLUES 9300-5421 PC BOARD MD-21ISS. 6, 93005421
CONTROLUES AX-2000-00-00-03C AXIMA2000 2-AXIS CONTROLLER 964369-37
CONTROLUES EMERSON DXE-208CB SERVOMOTOR DXE208CB 960106-13 A2
CONTROLUES IN-23ISS5 PC BOARD MODULEIN-23 ISS5
CONTROLUES V1850-KN1 FLUX VECTORDRIVE 9800-1000-I 25HP V1850
PLC,DCS備件模塊,伺服驅動,電源模塊, 人機界面
電子技術研發(fā);自動化技術、計算機軟硬件研發(fā);自營和代理各類商品和技術的進出口,但國家限定公司經(jīng)營或禁止進出口的商品和技術除外;機械設備、電子產品、機電設備、五金交電、儀器儀表、建材、通訊設備、紡織品、工藝品的批發(fā)、代購代銷;工業(yè)自動化工程設計、施工。
福州卓凱電子科技有限公司是一家銷售歐日美各類自動化產品的高新技術企業(yè)。與著名工控產品廠商建立了長期穩(wěn)定的商務合作關系,公司主要代理銷售的產品包括模塊、主板、電機、驅動器、電源、傳感器、變頻器、繼電器、電磁閥等。這些產品廣泛應用于船舶、煤礦、煉鋼、半導體、冶金、發(fā)電、物流、紡織、印刷、運輸、包裝等行業(yè)。我們專業(yè)的團隊將把客戶的需求放在首位,時時更新,提供有速度、有質量的服務,以滿足各行業(yè)客戶需求。...