品牌:Rexroth/力士乐 | 型号:0820055102 | 材质:塑料 |
连接形式:螺纹 | 加工定制:否 | 公称通径:0820055102mm |
密封形式:软密封型 | 压力环境:常压 | 工作温度:常温 |
标准:原装 | 流动方向:换向 | 形态:蝶式 |
零部件及配件:配件 | 用途:调压 | 规格:0820055102 |
气动阀片0820055102-0830100632-R412006251分气块aventics
R988050835安沃驰PRE-DA-080-0100 MD-MM-PUR-MR
R988050836安沃驰PRE-DA-080-0160 MD-MM-PUR-MR
R988050840安沃驰PRE-DA-080-0400 MD-MM-PUR-MR
R988050842安沃驰PRE-DA-100-0025 MD-MM-PUR-MR
R988050843安沃驰PRE-DA-100-0050 MD-MM-PUR-MR
R988050844安沃驰PRE-DA-100-0080 MD-MM-PUR-MR
R988050845安沃驰PRE-DA-100-0100 MD-MM-PUR-MR
R988050850安沃驰PRE-DA-100-0400 MD-MM-PUR-MR
R988051901安沃驰PRE-DA-040-0125 MD-MM-PUR-MR
R988051902安沃驰PRE-DA-050-0125 MD-MM-PUR-MR
R988051903安沃驰PRE-DA-063-0125 MD-MM-PUR-MR
R988051904安沃驰PRE-DA-080-0125 MD-MM-PUR-MR
R988051905安沃驰PRE-DA-100-0125 MD-MM-PUR-MR
R988051913安沃驰PRE-DA-032-0125 MD-MM-PUR-MR
R988063244安沃驰FRL FOR PS0178-01
R988063245安沃驰FRL FOR PS0178-02
R988067620安沃驰PS0198-01 TC08 VALVE BLOCK
R996000003安沃驰DAMPER RUBBER W22-358-0232
R996000007安沃驰ROD SEAL 500C/90 (90X114X15)
R996000011安沃驰SEALING TAPE GRR KOLBENDICHTB. 50&
R996000016安沃驰PRESS RELIEF VALVE 0-7BAR V06-222-NNKG
R996000019安沃驰BALL VALVE PN25 VN2000 G3/8"
R996000021安沃驰BALL VALVE PN25 VN2000 G1/2"
R996000023安沃驰PRESSURE GAUGE G1/4 0-40 D50
R996000024安沃驰BALL VALVE KLINGER VN2000 G6/4"
R996000025安沃驰SILENCER AN800-14 G6/4"
R996000029安沃驰DAMPER RUBBER W22-358-0183
R996000030安沃驰DAMPER RUBBER W22-358-0180
R996000031安沃驰DAMPER RUBBER W22-358-0172
R996000033安沃驰ROD SEAL KSTG-DICHT. 523+168+&
R996000034安沃驰KSTG-DICHT. 167+168+523/80+100//25
R996000041安沃驰FILTER INSERT F. LFW 330 G25 A10
R996000042安沃驰BALL VALVE 3 WEGEHAHN
R996000044安沃驰SEAL KIT FUER KHA DN40
R996000045安沃驰SEAL KIT FUER KHA DN80
R996000047安沃驰DAMPER RUBBER W22-358-0190
R996000048安沃驰DAMPER RUBBER W22-358-0186
R996000050安沃驰BALL VALVE KHA-SL-DN40 PN63
R996000051安沃驰BALL VALVE KHA-SL-DN80 PN40
R996000057安沃驰BEARING PEDESTAL RA8040
R996000062安沃驰DAMPER RUBBER W22-358-0228
R996000066安沃驰RING ST/AHAG-D767-4/
R996000159安沃驰PRESSURE GAUGE G1/4A 0-6 D63 &
R996000175安沃驰ELBOW UNION INKL.KUNSTSTOFFROHR
R996000386安沃驰PRUEFANSCHLUSS M16X1.5
R996000473安沃驰PSB-032-A018/DREHANTRIEB/ZNG 90-03-335-1
R996000476安沃驰BUSHING D300/340
R996000477安沃驰CLAMPING RING D300/340 PRESSRING
R996000492安沃驰CYLINDER BOTTOM D340
R996000493安沃驰CYLINDER HEAD D340
R996000494安沃驰CHOKE AUSLASS G1 1/2" L.ZNR
R996000496安沃驰DAMPING RING HINTEN D300/340
R996000497安沃驰NUT F.ZUGSTANGE D300 LANG
R996000499安沃驰SEAL F.ROHR D340
R996000508安沃驰CONTAINER 167/40/63 ROHRLAENGE
R996000512安沃驰ZUGSTANGE F. ZYL.500C/300/227/90
R996000515安沃驰PISTON RING D300
R996000516安沃驰DAMPING RING VORNE D300/340
R996000519安沃驰PISTON RING D340
R996000521安沃驰SEAL ROHRDICHTUNG D300
R996000536安沃驰CENTERING SLEEVE D 9MM (10STK)
R996000871安沃驰TAP 4-WEGE
R996001055安沃驰BEARING BUSHING AHAG-032-D767/
R996001102安沃驰THRUST RING ST/AHAG-D767-3/
R996001111安沃驰PISTON ROD CYL WAERMEZY. D300/HUB227
R996001115安沃驰PISTON ROD CYL WAERMEZY. D340/HUB240
R996001181安沃驰PRESSURE AMPLIFIER MAXIMATOR MPLV 2
R996001255安沃驰LUBRICATING GREASE RHF 1 400G JED003-M0
R996001344安沃驰RUBBER GASKET 167+523/125//32
R996001346安沃驰DAMPER RUBBER W22-358-0178
R996001429安沃驰CONNECTION SOCKET KDGI 38 NW7 MSV
R996001457安沃驰SHORT-STROKE CYL. 12X40 DW
R996001559安沃驰CYLINDER PAKET TS RET 04
R996001560安沃驰VALVE PAKET TS RET 04
R996001580安沃驰PN-SYSTEM SAUGTRAVERSE
R996001603安沃驰COMPRESSED-AIR CYL D12 H10 DW
R996001604安沃驰SHORT-STROKE CYL. 12X20 DW
R996001605安沃驰COMPRESSED-AIR CYL D20 H10 DW O.D
R996001732安沃驰PISTON ROD CYL DM125/0150 MM
R996001778安沃驰MAINTENANCE UNIT NL4 G1/2 PROJEKT:MP M
R996001970安沃驰LUFTFEDERVENTIL
R996002002安沃驰CURRENT COLLECTOR STROMABNEHMERMODUL
R996002003安沃驰MODULE FAHRERSTAND
R996002004安沃驰CONTROL PANEL SPALTUEBERBRUECKUNG
R996002005安沃驰DIR.-CONTROL VALVE 5/2 *** 1 110 VDC
R996002009安沃驰VENTIL V581-5/2DS-110DC-I2-MODI//IMPULS
R996002022安沃驰SOLENOID-OPERATED G1 HBL ABSPERRUNG
R996002023安沃驰PNEUM-VALVE AUSGLEICHSVENTIL LUF&
R996002031安沃驰CAP FUER NL2
R996002032安沃驰CONNECTING PIECE REMISENANSCHLUSSTUECK
R996002033安沃驰MODULE HILFSFAHRERSTAND
R996002040安沃驰PRESSURE REDUCING 6 BAR
R996002041安沃驰PRESSURE REDUCING 3,2 BAR
R996002053安沃驰AIR-FILTER INSERT BGT
R996002055安沃驰ELBOW UNION M6-DM6 (31820600)
R996002060安沃驰PNEUM-VALVE NOTBREMSVENTIL CNOMO
R996002063安沃驰DIR.-CONTROL VALVE 5/2 *** 1 MF METALL
R996002069安沃驰LUFTFEDERVENTIL 2-STUFIG M. KURZEM HEBEL
R996002117安沃驰TIE ROD CYLINDER ITS 200/400 LANGSAML.
R996002131安沃驰VALVE PANEL BGT-1.3.1
R996002141安沃驰VALVE PANEL BGT-1.4.1
R996002329安沃驰TRB-DA-032-1000-0-2-1-1-2-1-ACC
R996002635安沃驰MAINTENANCE UNIT 2X65055 KIT
R996002636安沃驰CYL-VALVE-UNIT 2X65056 KIT
R996002637安沃驰DIR.-CONTROL VALVE KIT
R996002768安沃驰DIR.-CONTROL VALVE 2X65057
R996002770安沃驰PNEUMATIC-VALVE UN CD01 10-FACH M12
R996002862安沃驰NON-RETURN VALVE G3/4" OHNE FEDER
R996002863安沃驰NON-RETURN VALVE G1" OHNE FEDER
R996003217安沃驰PNEUMATIC SYSTEM SCHALTSCHRANK MYSCAN
R996003312安沃驰PISTON ROD CYL 270P/76/200/40
R996003362安沃驰MAINTENANCE UNIT NL1 G 1/4
R996003363安沃驰PRESSURE REGULATOR NL1 G1/4"
R996003498安沃驰PRESSURE REGULATOR NL2 0,5-10BAR
R996003517安沃驰TIE ROD CYLINDER TRB 125/400 LANGSAML.
R996003580安沃驰PN CONTROLS 61 0158 09
R996003669安沃驰VALVE SYSTEM 581 ***1 3-FACH
R996003670安沃驰VALVE SYSTEM 581 ***3 2-FACH
R996003722安沃驰MAINTENANCE UNIT AS3 G1/2 5-FACH
R996003781安沃驰COMPRESSED-AIR CYL MEHRSTELLUNGSZYLINDE&
R996003791安沃驰VENTILEINHEIT 4-FACH TC15 G1/4"
R996003818安沃驰PISTON ROD CYL CD4 MIT BEFESTIGUNG &
R996003851安沃驰PRESSURE REGULATOR NL1 G1/4" 2-FACH
R996003952安沃驰OSCILLATOR *** 3 / EINHEIT
R996004283安沃驰3/2 WEGEVENTIL M.KIPPHEBEL U.HALTER G1/8
R996004868安沃驰VALVE PANEL MVH90C3/MVH200C3 TC08
R996005110安沃驰PNEUMATIC-VALVE UN HF03 10 FACH VAKUUM
R996005190安沃驰PVS-032-A040-0/EMERGENCY TD RI 24V
R996005234安沃驰ROTATING DRIVESWIV AP4 DA
R996005297安沃驰PRESSURE REGULATOR DRUCKTRENNPLATTE HF0&
R996005571安沃驰SUPPORT CLAMP RBOS69-13/1056 32/40
R996005678安沃驰VALVE SYSTEM 2-FACH TC08
R996005679安沃驰VALVE SYSTEM 4-FACH TC08
R996005680安沃驰VALVE SYSTEM 6-FACH TC08
R996005681安沃驰VALVE SYSTEM 8-FACH TC08
R996005737安沃驰PRESSURE GAUGE G1/4B -1-3 D50 &
R996005770安沃驰DBL-ACTING PNEU.CY DKZ063/0160 L8228330&
R996005833安沃驰GUIDE UNIT TRB32X160-GU1-PB
R996005836安沃驰RBOS6913/593 5/2VENTIL *** 3 XEPX 1029
R996005845安沃驰DIR.-CONTROL VALVE 5/4 24VDC O. FEDER
R996006064安沃驰BUSHING .
R996006070安沃驰MAINTENANCE UNIT AS2 G1/4" 6-FACH
R996006209安沃驰RBOS40-99-514 GEGENLAGER MIT BOLZEN 25
R996006215安沃驰PRESS FILTER FDR G1/2-8 MIKRO
R996006216安沃驰AIR DISTRIBUTOR 8XG1/4 2XG1/2
R996006297安沃驰VALVE BLOCK CD 01 8-FACH M12
R996006339安沃驰PISTON ROD CYL ZYLINDER M&
R996006501安沃驰MAINTENANCE UNIT G3/8 0,5-10BAR 5MIKRO
R996006763安沃驰PRESSURE REGULATOR G 1_4" 16BAR 0,2-6BAR
R996006909安沃驰SO-ZYLINDER 167/D160/1000 HUBBEGRENZUNG
R996007020安沃驰MAINTENANCE UNIT NL6 4-TEILIG 3/4"
R996007038安沃驰PZY-032-MEHRSTELL.ZYL TRB D40/50 D40/100
R996007212安沃驰DIRT TRAP DN 150 PN40
R996007213安沃驰BALL VALVE DN150 PN40
R996007301安沃驰2/2 VENTIL G 1/4 24 VDC NC 0-10BAR
R996007459安沃驰PFRL-032-A038/AS3 G1/2 5-FACH ABFR.
R996007460安沃驰KPZ-DA-020-0010-A092
R996007687安沃驰MAINTENANCE UNIT NL4 G1/2" 4-FACH
R996007855安沃驰MAINTENANCE UNIT G3/8 0,5-10BAR 40MIKR
R996008010安沃驰PISTON ROD CYL RBOS30-97-232 ZYLIND&
R996008016安沃驰RBOS69-13/496 DRUCKREGLER + VERT.
R996008041安沃驰PISTON ROD RBOS6913/538B KOLBEN&
R996008079安沃驰RBOS30-99-289 EJEKTORD_SE MIT ZUBEH-R
R996008106安沃驰MAINTENANCE UNIT AS3 G1/2 ABFR. RE-LI
R996008109安沃驰VALVE BLOCK V840-4/2OC-DA06-24DC&
R996008186安沃驰MAINTENANCE UNIT G1/2 RBOS80-94-021
R996008194安沃驰PNEUMATIC-VALVE UN VENTILBLOCK *** 1 8X
R996008213安沃驰PRESSURE SWITCH EINSTELLUNG 5,0 BAR
R996008260安沃驰PNEUM-VALVE 3/2 WEGEVENTIL G1 1/&
R996008337安沃驰PVTS-032-A093/CD01-PA GESTELL VSA
R996008371安沃驰CYLINDER ASSEMBLY MANIPULATORVERMESSUNG
R996008622安沃驰PZY-032-A190/D80 H125 POS.-REGLER
R996008643安沃驰PVTS-032-A100/CD01-PA GESTELL SSV
R996008659安沃驰MAINTENANCE UNIT PFRL-032-A115/WARTUN&
R996008680安沃驰PSB-032-A338/DRUCKREGLER M. KAPPE
R996008797安沃驰VALVE SYSTEM CD01 17-FACH
R996009076安沃驰MAINTENANCE UNIT AS2 G1/4"
R996009082安沃驰CYLINDER RBOS30-00-327 KH-ZYL&
R996009083安沃驰KIT-PRA-D-040-050-MONO-CD07-24VDC-ACC
R996009138安沃驰PISTON ROD CYL 020/025 HALTEEINH. F&
R996009174安沃驰VALVE SYSTEM SAEGE VORSCHUB BSV-4&
R996009175安沃驰VALVE SYSTEM EINTRANSPORT BSV-NK
R996009203安沃驰LINEAR UNIT D20/0100 + H-FUEHRUNG
R996009241安沃驰PISTON ROD CYL D40/0030 KHZ SONDER
R996009266安沃驰LINEAR UNIT 20/0160 + H-FUEHRUNG
R996009279安沃驰CONTROL CABINET SKF MVU320BLA
R996009299安沃驰TIE ROD CYLINDER 523 160 M.VENTILAUFB.
R996009336安沃驰PN CONTROLS BAUEINHEIT CD 01 &
R996009401安沃驰STEUERUNGSTECHNIK HANDLINGSKOMPONENTEN &
R996009516安沃驰VALVE SYSTEM CD01 4-FACH NPS-45
R996009561安沃驰SHORT-STROKE CYL. MEHRSTELLUNGSEINHEIT
R996009582安沃驰MAINTENANCE UNIT NL4 G1/2 PROJEKT: MP
R996009583安沃驰MAINTENANCE UNIT NL4 G1/2 PROJEKT-MP
R996009627安沃驰MAGNETIC FIELD SWI 0-220V
R996009633安沃驰PRESSURE AMPLIFIER 63
R996009650安沃驰ALUBLOCK 2-FACH MIT HOHLSCHRAUBEN
R996009651安沃驰CONTROL BLOCK 3-FACH M. HOHLSCHRAU&
R996009652安沃驰BLOCK ALU 4-FACH MIT HOHLS&
R996009654安沃驰VENTILSYSTEM 4-FACH TC15 G1/4"
R996009687安沃驰HANDLING MODULE SKF MVU250B KOMPLETT
R996009692安沃驰CYLINDER ASSEMBLY PRA63X220-AT4
R996009693安沃驰VALVE SYSTEM ***2 2-FACH 24VDC
R996009718安沃驰PN-SYSTEM MANIPULATOR CSF
R996009720安沃驰CHOKE 1/2" LADLE TURRET
R996009735安沃驰CONTROL CABINET INERT GAS PANEL
R996009738安沃驰PROFILE CYLINDER PRA DM80/0215 MT4
R996009744安沃驰BALL VALVE KUGELHAHNBLOCK LT. Z&
R996009806安沃驰PISTON ROD CYL 63/0100 PRA SONDER
R996009821安沃驰VALVE SYSTEM 4 FACH VDMA02
R996023374安沃驰PVT-032-A270/PNEUMATIKTAFEL MWA160
R996023456安沃驰PSB-032-A297/HUBTISCH TSRET0203 HORIZ.
R996023458安沃驰PSB-032-A298/KONTAKTBRUECKE 0,2M KABEL
R996023459安沃驰PSB-032-A299/KONTAKTBRUECKE 2OUT
R996023460安沃驰PSB-032-A300/KONTAKTBRUECKE 24VDC 0,2M
R996023649安沃驰CONTROL CABINET PVS-032-A215/INERT G&
R996023650安沃驰CONTROL CABINET PVS-032-A216/INERT G&
R996047030安沃驰VALVE SYSTEM CD01 1ARL
R996047310安沃驰VENTILBLOCK CD 01 9-FACH PROJEKT:MP
R996009831安沃驰MAINTENANCE UNIT AS3 G1/2" 7-FACH
R996009836安沃驰MAINTENANCE UNIT NL4 G1/2 PROJEKT: HS
R996009852安沃驰BALL VALVE KUGELHAHN NL4 1/2"
R996009893安沃驰PISTON ROD CYL 40/0050 HUB PRA
R996009923安沃驰PISTON ROD CYL MF.ZYL.50/120SERIE522
R996009930安沃驰PULSE GENERATOR IMPULSFORMER
R996010165安沃驰MAINTENANCE UNIT BESCHICKUNG LCV
R996010172安沃驰VALVE SYSTEM RAVS O. SPROSS. M. ST
R996010379安沃驰VALVE SYSTEM 3 VB-XXN VAR.1
R996010380安沃驰VALVE SYSTEM 2 VB-XXN VAR.2
R996010381安沃驰VALVE SYSTEM 1 VB-33N VAR.2
R996010464安沃驰PN-SYSTEM DRUCKUEBERSETZER
R996010674安沃驰VALVE SYSTEM VFL-1D
R996011551安沃驰RTC-DA-050-0700-BV-S44-SENSOR BAR
R996011552安沃驰RODLESS CYLINDER RTC DM50/1000 HUB
R996011553安沃驰RODLESS CYLINDER RTC DM63/1000 HUB
R996011635安沃驰VALVE SYSTEM VB-45N VAR.2
R996011712安沃驰VALVE SYSTEM F. VFE-FUNKTION EINL.
R996011714安沃驰VALVE SYSTEM PVS-032/SAUGER U. AB&
R996011944安沃驰RODLESS CYLINDER RTC DM50/500 HUB
R996012003安沃驰***LATING VALVE STROMABNEHMER
R996012876安沃驰GROMMET GT 1219 MSV ED
R996012877安沃驰CONNECTOR PLUG KSGI 12 NW7 MSV
R996012878安沃驰PISTON ROD CYL 0822121003 SENSORBEF.
R996013584安沃驰PISTON ROD CYL 40/0040 KHZ SONDER
R996013848安沃驰BELLOWS CYLINDER W02-358-7012
R996015071安沃驰CYL-VALVE-UNIT PRA/63/25
R996015149安沃驰THREE POS CYLINDER 200/080/750 SERIE ITS
R996015229安沃驰BELLOWS CYLINDER W01-M58-6381
R996015629安沃驰BOLT D16X60-AA6_FFQ50ES
R996015630安沃驰SWIVEL MOUNTING TQ50ES GABEL
R996016105安沃驰PISTON ROD CYL PRA/063/0350 VER.2
R996016106安沃驰PISTON ROD CYL PRA/063/0400 VER.2
R996016108安沃驰PISTON ROD CYL PRA/063/0600 VER.2
R996016213安沃驰BALL VALVE KH 34 K ES E
R996016519安沃驰TIE ROD CYLINDER TRB 125/050 LANGSAML.
R996016668安沃驰TIE ROD CYLINDER TRB 125/100 LANGSAML.
R996017044安沃驰SEAL KIT F.P-ZYL.523/0100 V2A&
R996017499安沃驰PNEUMATIC-VALVE UN CD01-AL 12-FACH
R996017799安沃驰SEAL KIT F. RECKZYLINDER D63 &
R996017962安沃驰VALVE SYSTEM VYC-00871
R996017963安沃驰VALVE SYSTEM VYC-00872
R996017964安沃驰VALVE SYSTEM VYC-00873
R996017965安沃驰VALVE SYSTEM VYC-00675-A
R996017969安沃驰VALVE SYSTEM VYC-00880
R996017970安沃驰VALVE SYSTEM VYC-00881
R996018022安沃驰CONNECTION PLATE *** 1 RBOS6913/1101
R996018257安沃驰ERSATZFILTERELEMENT F. HOCHLEISTUNGS-
R996018298安沃驰COMPACT CYLINDER D32X25 DW A.M. FEDER
R996018359安沃驰PFRL-032-A089/AS3 G1/2 5-FACH ABFR.
R996018748安沃驰VALVE SYSTEM CD01 LISEC 2070689
R996018792安沃驰PVS-032-A154/TIEFZIEHANLAGE
R996019237安沃驰PNEUMATIC-VALVE UN CD01 2-FACH MVU250B
R996019612安沃驰PNEUMATIC SYSTEM KOMPAKTEJEKTOR SERIE
R996019727安沃驰VALVE SYSTEM 581 ***1 4-FACH
R996019774安沃驰CONTROL CABINET SCHAF-TOETUNGSBOX
R996020836安沃驰SPECIAL SUBASSEMBL PSB-032-A281/ED02 2-&
R996021052安沃驰PN-SYSTEM LABELING REV 2
R996021491安沃驰PZY-032-A197/TRB D100 H1050
R996021537安沃驰PRESSURE REGULATOR PSB-032-A283/MD02 3-&
R996021642安沃驰POSITIONING CYLIND SITZVERSTELLUNG AUSF&
R996021887安沃驰PVTS-032-A083/CD01-PA VFL-1D
R996022071安沃驰PN-SYSTEM FOLIERANLAGE WE AS5 &
R996022194安沃驰PVTS-032-A087/CD01-PA VL-1N
R996022699安沃驰PSB-032-A291-0 / TS RET 03
R996022915安沃驰PVTS-032-A107/VENTILEINHEIT 30BAR
R996022916安沃驰PVTS-032-A108/VENTILEINHEIT 840 4-FACH
R996022917安沃驰PVTS-032-A109/SCHNEIDMASCHINE STARKON-SX
R996022918安沃驰PVTS-032-A110/ANG. PERFORATION STARK.-SX
R996023262安沃驰VALVE SYSTEM PVTS-032-A112/VENTIL&
R996023263安沃驰VALVE SYSTEM PVTS-032-A113/CD07 M&
R996023264安沃驰VALVE SYSTEM PVTS-032-A114/CD07 M&
R996023265安沃驰PVTS-032-A123/SAMMELPLATTE 8-FACH
AVENTICS? 2x二位三通 换向阀, 系列 HF03-LG 0820055102
规格
操作
电子
额定流量Qn
850 l/min
换向原理
2x3/2
结构
常闭/常闭
最小运行压力
-0.9 bar
运行压力
10 bar
工作电压DC
24 V
电压偏差 DC
-15% / +20%
手动控制装置
按钮式
密封原理
软密封
先导
外部的
合格证书
UR (Underwriters Laboratories)
预控阀的宽度
16 mm
阀门结构形式
滑阀,正重叠
连接类型
底板连接
组合原理?(闭锁原理)
单重底板原理
控制压力最小
2.5 bar
控制压力
10 bar
***环境温度
0 °C
环境温度
50 °C
介质温度最小值
0 °C
介质温度值
50 °C
介质
压缩空气
颗粒大小 max.
5 ?m
压缩空气中的含油量 最小.,
0 mg/m?
特点
模块化设计,最多可包含 32 个阀门和 32 个线圈
高达 850 l/min 的流量
每个线圈 0.35 W 的导阀
塑料底板和端板减轻了重量
直接安装在组合系统剖面上
Multipol 或现场总线连接实现较强的连接性
集成接头及所有连接件指向一致