YSR-8-8-C YSR-8-8-C液壓緩沖器

YSR-8-8-C 液壓緩沖器

150855 舌簧式行程開關(guān)  SME-8-K-LED-24
163464 雙作用氣缸      DNC-100-350-PPV-A
160893 雙作用氣缸      CRDNGS-63-200-PPV-A
163496 雙作用氣缸      DNC-125-300-PPV-A
163432 雙作用氣缸      DNC-80-150-PPV-A
157500 雙作用氣缸      DNGZS-250-600-PPV-A
8995 旋轉(zhuǎn)手柄式閥    H-5-1/4-B
159581 減壓閥          LR-1/2-D-MIDI
19758 電磁閥          MFH-5-1/8-B
159712 電磁閥          MN1H-5/2-D-3-C
30935 帶電纜插頭插座  KMF-1-24DC-2,5-LED
187334 壓力比例閥      MPPES-3-1/4-10-420
4527 電磁線圈        MSFG-24DC/42AC
34411 電磁線圈（F型）   MSFG-24DC/42AC-OD
30459 舌簧式行程開關(guān)  SMEO-1-LED-24-B
171169 行程開關(guān)        SME-8-ZS-KL-LED-24
15885 單作用氣缸      EG-4-5-PK-2
150855 舌簧式行程開關(guān)  SME-8-K-LED-24
150857 舌簧式行程開關(guān)  SME-8-S-LED-24
30459 舌簧式行程開關(guān)  SMEO-1-LED-24-B
153495 減壓閥          LRMA-QS-4
3110 Y形帶銷接桿     SG-M6
150857 舌簧式行程開關(guān)  SME-8-S-LED-24
159602 面板式安裝壓力  FMA-63-10-1/4-EN
532723 雙作用氣缸      DNCB-32-75-PPV-A
156535 雙作用緊湊型氣  ADVU-32-30-P-A
156617 雙作用緊湊型氣  ADVU-32-10-A-P-A
532723 雙作用氣缸      DNCB-32-40-PPV-A
195984 雙作用氣缸      DSNU-32-100-P-A
163341 雙作用氣缸      DNC-40-100-PPV-A
532908 雙作用氣缸      DNCB-100-500-PPV-A
532748 雙作用氣缸      DNCB-40-500-PPV-A
196023 雙作用氣缸      DSNU-32-80-PPV-A
7959 電磁閥          MFH-3-1/4-S
14015 真空發(fā)生器      VAD-1/8
153149 Y形快插式螺紋接 QSY-6
130608 快插式螺紋接頭  QS-12-8
153038 快插式螺紋接頭  QS-8-6
152699 塑料氣管        PAN-6X1-SI
4527 電磁線圈        MSFG-24DC/42AC
150855 舌簧式行程開關(guān)  SME-8-K-LED-24
153421 快插式螺紋接頭  QSK-1/4-6
153424 快插式螺紋接頭  QSK-3/8-8
30459 舌簧式行程開關(guān)  SMEO-1-LED-24-B
150857 舌簧式行程開關(guān)  SME-8-S-LED-24
193145 單向節(jié)流閥      GRLA-1/8-QS-8-D
19219 雙作用氣缸      DSNU-25-25-P-A
2316 消聲器          U-1/4
153166 快插式螺紋穿板  QSSF-1/4-8-B
153049 L形快插式螺紋接 QSL-1/4-8
159666 聚氨酯氣管      PUN-8X1,25-BL
159668 聚氨酯氣管      PUN-10X1,5-BL
151873 電磁閥          MFH-5/3G-D-3-C
6755 快速排氣閥      SEU-3/8
15082960 球閥驅(qū)動(dòng)單元    CRQH-DFPA-22-1/2
535987 電磁閥          NVF3-MOH-5/2-K-1/4-EX
4540 電磁線圈        MSFW-230AC
15222 磁性無桿氣缸    DGO-16-300-PPV-A-B
19219 雙作用氣缸      DSNU-25-25-P-A
193145 單向節(jié)流閥      GRLA-1/8-QS-8-D
151669 行程開關(guān)        SME-1-LED-24-B

YSR-8-8-C液壓緩沖器  530031 單向閥          HGL-1/4-B
530031 單向閥          HGL-1/4-B
11910 葉片式擺動(dòng)氣缸  DSR-16-180-P
9291 按鈕開關(guān)        T-30-SW
6211 電磁閥          MFH-5-1/4
10410 雙電控電磁閥    JMFH-5-1/4
35414 波紋吸盤        VASB-55-1/4-NBR
152837 電感式行程開關(guān)  SMTO-4U-NS-K-LED-24
170521 伺服定位控制器  SPC200/P01
34431 標(biāo)準(zhǔn)插座        MSSD-F
156881 雙作用緊湊型導(dǎo)  ADVUL-32-50-P-A
525895 電感式行程開關(guān)  SME-8F-DS-24V-K2,5-OE
172947 氣源安全啟動(dòng)閥  HEE-3/4-D-MIDI-24
159614 過濾器          LF-3/4-D-MAXI
159622 油霧器          LOE-3/4-D-MAXI
159626 減壓閥          LR-3/4-D-MAXI
10773 可調(diào)式壓力開關(guān)  PEV-1/4-B
159606 D系列三連件     FRC-3/4-D-MAXI
2199 電磁閥          MCH-3-1/8
153307 快插式螺紋接頭  QSM-1/8-6
153033 快插式螺紋接頭  QS-8
153130 T型快插式接頭   QST-8
18200 10型閥島   10P-10-4C-FB-N-U-4J+U
11909 葉片式擺動(dòng)氣缸  DSR-12-180-P
11968 電磁閥          MFH-3-3/4-S
9301 選擇開關(guān)        N-22-SW
159422 帶電纜插頭插座  SIM-M8-3WD-2,5-PU
175093 安裝組件        SMBR-8-12
175094 安裝組件        SMBR-8-16
175095 安裝組件        SMBR-8-20
152742 電感式行程開關(guān)  SMTO-4U-PS-S-LED-24
153049 L形快插式螺紋接 QSL-1/4-8
153001 快插式螺紋接頭  QS-1/8-4
152587 聚氨酯氣管      PUN-8X1,25-SI
153215 L形快插螺紋分氣 QSLV2-1/4-8
153110 T形快插式螺紋接 QST-1/4-8
162968 單向節(jié)流閥      GRLA-1/4-QS-8-RS-B
153005 快插式螺紋接頭  QS-1/4-8
153049 L形快插式螺紋接 QSL-1/4-8
19758 電磁閥          MFH-5-1/8-B
30558 氣路板          PAL-1/8-8-B
2143 快速插座        KD4-1/4-A
153011 快插式螺紋接頭  QS-1/2-16
18210 10P-14-8C-FB-R-Y-5CM2L+VZB
18210 10P-14-8C-FB-R-Y-CD3C3M+VZB
18210 10P-14-8C-FB-R-Z-6J2L+VZB
18210 10P-14-8C-FB-R-Z-8J+VZB
11968 電磁閥          MFH-3-3/4-S
9301 選擇開關(guān)        N-22-SW
159422 帶電纜插頭插座  SIM-M8-3WD-2,5-PU
175093 安裝組件        SMBR-8-12
175094 安裝組件        SMBR-8-16
175095 安裝組件        SMBR-8-20
152742 電感式行程開關(guān)  SMTO-4U-PS-S-LED-24
11909 葉片式擺動(dòng)氣缸  DSR-12-180-P
6420 電磁閥          MFH-5-1/2  DC24
150855 舌簧式行程開關(guān)  SME-8-K-LED-24
159586 油霧器          LOE-3/8-D-MIDI
9541 球閥            QH-1/4
163304 雙作用氣缸      DNC-32-140-PPV-A
175484 電感式行程開關(guān)  SMT-8-PS-S-LED-24-B
173212 舌簧式行程開關(guān)  SME-10-SL-LED-24
150855 舌簧式行程開關(guān)  SME-8-K-LED-24
151848 氣控閥          VL-5/3G-D-2-C
150403 電感式傳感器    SIEN-M12B-PS-S-L
156540 雙作用緊湊型氣?ADVU-40-5-P-A
156620 雙作用緊湊型氣  ADVU-32-25-A-P-A
156526 雙作用緊湊型氣  ADVU-25-25-P-A
156555 雙作用緊湊型氣  ADVU-50-40-P-A
156556 雙作用緊湊型氣  ADVU-50-50-P-A
156520 雙作用緊湊型氣  ADVU-20-40-P-A
156523 雙作用緊湊型氣  ADVU-25-10-P-A
156536 雙作用緊湊型氣  ADVU-32-40-P-A
156547 雙作用緊湊型氣  ADVU-40-50-P-A
188129 單作用螺紋氣缸  AEVC-20-10-I-P-A
156505 雙作用緊湊型氣  ADVU-12-30-P-A
156510 雙作用緊湊型氣  ADVU-16-20-P-A
156619 雙作用緊湊型氣  ADVU-32-20-A-P-A
156521 雙作用緊湊型氣  ADVU-20-50-P-A
5079 雙作用氣缸      DSN-25-80-P
189469 微型導(dǎo)向驅(qū)動(dòng)器  DFC-10-15-P-A-GF
170835 中型導(dǎo)向驅(qū)動(dòng)器  DFM-16-30-P-A-GF
170836 中型導(dǎo)向驅(qū)動(dòng)器  DFM-16-40-P-A-GF
170842 中型導(dǎo)向驅(qū)動(dòng)器  DFM-20-30-P-A-GF
161147 雙作用多位氣缸  ADVUP-25-    -P-A
156517 雙作用緊湊型氣  ADVU-20-20-P-A
10410 雙電控電磁閥    JMFH-5-1/4
6680 與門            ZK-1/8-B
6817 基本閥，面板    SV-3-M5
173134 電磁閥          MEH-5/2-5,0-L-B
4527 電磁線圈        MSFG-24DC/42AC
5755 延時(shí)閥          VZ-3-PK-3
8823 雙氣控閥        JH-5-1/8
6228 雙電控電磁閥    CJM-5/2-1/2-FH
3527 氣源安全啟動(dòng)閥  ZSB-1/8
5754 延時(shí)閥          VZO-3-PK-3
10773 可調(diào)式壓力開關(guān)  PEV-1/4-B
6685 與門            ZK-PK-3
14660 電控閥          MEH-3-0,9
153491 減壓閥          LRMA-1/8-QS-6
153497 減壓閥          LRMA-QS-8
153496 減壓閥          LRMA-QS-6
151215 單向節(jié)流閥      GR-1/8-B
2094 旋轉(zhuǎn)分氣塊      GF-1/4
170681 氣源安全啟動(dòng)閥  HE-D-MINI
173433 雙電控電磁閥    JMEH-5/2-1/8-P-B
2674 Y形帶銷接桿     SG-M10
10410 雙電控電磁閥    JMFH-5-1/4
6159 雙電控電磁閥    CJM-5/2-1/4-FH
2061 自對(duì)中連接件    FK-M6
2062 自對(duì)中連接件    FK-M8
33407 端板組件        EP-ME-1/8
30984 自對(duì)中連接件    FK-M5
159590 D系列三連件     FRC-1/2-D-MIDI
163343 雙作用氣缸      DNC-40-160-PPV-A
153477 截止閥          HE-3-QS-10
153476 截止閥          HE-3-QS-8
153008 快插式螺紋接頭  QS-3/8-10
9686 快速排氣閥      SE-1/4-B
161167 壓力比例閥      MPPE-3-1/4-6-010-B
3720 單向節(jié)流閥      GR-1/2
30459 舌簧式行程開關(guān)  SMEO-1-LED-24-B
151866 優(yōu)先主控信號(hào)雙?JD-5/2-D-3-C
151867 氣控閥          VL-5/3G-D-3-C
36198 舌簧式行程開關(guān)  SMEO-4U-K-LED-24
153538 減壓閥          LR-1/4-QS-8
30003 雙作用氣缸      DNG-63-150-PPV-A
151215 單向節(jié)流閥      GR-1/8-B
156585 雙作用緊湊型氣  ADVU-100-80-P-A
547705 VACUUM GENER.   VN-14-H-T4-PI4-VI5-RO2
163142 電磁閥          CPE18-M1H-5L-1/4
156853 雙作用緊湊型導(dǎo)  ADVUL-16-15-P-A
150400 電感式傳感器    SIEN-M12B-NS-K-L
30002 雙作用氣缸      DNG-50-300-PPV-A
13681 雙作用短行程氣  ADV-20-25-A
193152 單向節(jié)流閥      GRLA-1/2-QS-12-D
162965 單向節(jié)流閥      GRLA-1/8-QS-6-RS-B
162968 單向節(jié)流閥      GRLA-1/4-QS-8-RS-B
547705 VACUUM GENER.   VN-14-H-T4-PI4-VI5-RO2
153538 減壓閥          LR-1/4-QS-8
157307 法蘭安裝件      FUA-100
159593 安裝支架（兩件）  HFOE-D-MIDI/MAXI
157317 腳架安裝件      HUA-100
186463 過濾器          LF-1/2-D-MAXI
153011 快插式螺紋接頭  QS-1/2-16
6844 消聲器          U-1/2-B
192161 貯氣罐          VZS-20-B
188399 增壓器          DPA-100-16
526099 壓力表復(fù)位      DPA-100-16-MA-SET
153038 快插式螺紋接頭  QS-8-6
153149 Y形快插式螺紋接 QSY-6
9688 快速排氣閥      SE-1/2-B
150400 電感式傳感器    SIEN-M12B-NS-K-L
161469 雙作用氣缸      DSW-40-25-P-B
369199 易耗件          DNC- 80-    PPVA
159594 濾芯            LFP-D-MIDI-5M
153472 截止閥          HE-2-1/4-QS-8
156047 雙作用緊湊型氣  ADVU-63-100-A-P-A
188587 雙作用氣缸      DSEU-32-100-P-A
19540 Y形倒鉤式接頭   Y-PK-2
18265 基本單元        CPV14-GE-MP-8
175732 基本單元        CPV10-GE-ASI-4E4A-M8
156877 雙作用緊湊型導(dǎo)  ADVUL-32-20-P-A
15885 單作用氣缸      EG-4-5-PK-2
13290 膜片式夾緊氣缸  EV-15/63-4
130608 快插式螺紋接頭  QS-12-8
18210 10P-14-8C-FB-R-Y-CD3C3M+VZB
9301 選擇開關(guān)        N-22-SW
33973 雙作用氣缸      DSNU-16-25-PPV-A
8742 雙作用氣缸      DSN-20-700-PPV
153118 T型快插式螺紋接 QSTL-1/8-6
170682 氣源安全啟動(dòng)閥  HE-D-MIDI
36456 雙作用氣缸      DNGZK-80-320-PPV-A
9264 帶六角螺母的關(guān)  SGS-M20X1,5
6186 耳軸支撐（2件）   LNZ-63/80
151178 單向節(jié)流閥      GRLA-3/8-B
12941 氣控單向閥      HGL-1/2
6755 快速排氣閥      SEU-3/8
151178 單向節(jié)流閥      GRLA-3/8-B
196940 雙電控電磁閥    CPE14-M1BH-5JS-1/8
6684 邏輯元件,或門   OS-PK-3
6685 與門            ZK-PK-3
10772 雙氣控閥        J-3-PK-3
161064 氣控閥          VL-5/3G-D-01
161109 標(biāo)準(zhǔn)底座        NAS-1/4-01-VDMA
159594 濾芯            LFP-D-MIDI-5M
153472 截止閥          HE-2-1/4-QS-8
156844 雙作用緊湊型導(dǎo)  ADVUL-12-5-P-A
15885 單作用氣缸      EG-4-5-PK-2
13290 膜片式夾緊氣缸  EV-15/63-4
130608 快插式螺紋接頭  QS-12-8
153038 快插式螺紋接頭  QS-8-6
153149 Y形快插式螺紋接 QSY-6
9688 快速排氣閥      SE-1/2-B
150400 電感式傳感器    SIEN-M12B-NS-K-L
150442 電感式傳感器    SIEN-M30NB-PS-K-L
161784 氣動(dòng)直線驅(qū)動(dòng)單  DGP-63-2010-PPV-A-B
171169 行程開關(guān)        SME-8-ZS-KL-LED-24
197306 雙作用多倍力氣?ADVUT-100X2-50-A-P-A-S6
197548 平行氣爪        HGP-25-A-B
197551 平行氣爪        HGP-35-A-B
161830 旋轉(zhuǎn)氣爪        HGR-25-A
170911 中型導(dǎo)向驅(qū)動(dòng)器  DFM-16-40-P-A-KF
170924 中型導(dǎo)向驅(qū)動(dòng)器  DFM-25-30-P-A-KF
170929 中型導(dǎo)向驅(qū)動(dòng)器  DFM-32-20-P-A-KF
170930 中型導(dǎo)向驅(qū)動(dòng)器  DFM-32-25-P-A-KF
170940 中型導(dǎo)向驅(qū)動(dòng)器  DFM-40-50-P-A-KF
163313 雙作用氣缸      DNC-32-250-PPV-A
162097 雙作用氣缸      DPZ-25-25-P-A-KF
162132 雙作用氣缸      DPZ-32-25-P-A-KF
162133 雙作用氣缸      DPZ-32-40-P-A-KF
162117 雙作用氣缸      DPZJ-25-10-P-A-KF-S2
162121 雙作用氣缸      DPZJ-25-80-P-A-KF-S2
162157 雙作用氣缸      DPZJ-32-100-P-A-KF-S2
161793 滾珠導(dǎo)軌氣動(dòng)驅(qū)  DGPL-32-300-PPV-A-KF-B
156507 雙作用緊湊型氣  ADVU-16-5-P-A
156602 雙作用緊湊型氣  ADVU-20-15-A-P-A
156213 雙作用緊湊型導(dǎo)  ADVUL-25-15-P-A-S6
163313 雙作用氣缸      DNC-32-250-PPV-A
156501 雙作用緊湊型氣  ADVU-12-10-P-A
533157 雙電控電磁閥    CPE10-M1BH-5/3B-QS6-B
163366 雙作用氣缸      DNC-50-100-PPV-A-KP
18209 基本單元        CPV18-GE-MP-8
30486 雙電控電磁閥    JMFH-5-1/8-B
9981 電磁閥          MCH-3-1/2
7885 電磁閥          MOCH-3-1/2
161728 電磁閥          MN1H-2-1/2-MS
14322 雙作用氣缸      DSNU-25-30-PPV-A
19758 電磁閥          MFH-5-1/8-B
6211 電磁閥          MFH-5-1/4
9857 電磁閥          MFH-3-1/2
9964 電磁閥          MFH-3-1/4
2187 電磁閥          MC-2-1/8
173141 電磁閥          MEH-5/3G-1/8-P-B
161974 滑動(dòng)導(dǎo)軌氣動(dòng)驅(qū)  DGPL-18-1200-PPV-A-GF-B
19789 雙電控電磁閥    JMFH-5-1/4-B
30002 雙作用氣缸      DNG-50-300-PPV-A
13681 雙作用短行程氣  ADV-20-25-A
193152 單向節(jié)流閥      GRLA-1/2-QS-12-D
162965 單向節(jié)流閥      GRLA-1/8-QS-6-RS-B
162968 單向節(jié)流閥      GRLA-1/4-QS-8-RS-B
547705 VACUUM GENER.   VN-14-H-T4-PI4-VI5-RO2
153538 減壓閥          LR-1/4-QS-8
157307 法蘭安裝件      FUA-100
159593 安裝支架（兩件）  HFOE-D-MIDI/MAXI
157317 腳架安裝件      HUA-100
186463 過濾器          LF-1/2-D-MAXI
153011 快插式螺紋接頭  QS-1/2-16
6844 消聲器          U-1/2-B
192161 貯氣罐          VZS-20-B
188399 增壓器          DPA-100-16
526099 壓力表復(fù)位      DPA-100-16-MA-SET
175484 電感式行程開關(guān)  SMT-8-PS-S-LED-24-B
173212 舌簧式行程開關(guān)  SME-10-SL-LED-24
150855 舌簧式行程開關(guān)  SME-8-K-LED-24
151848 氣控閥          VL-5/3G-D-2-C
150403 電感式傳感器    SIEN-M12B-PS-S-L
156540 雙作用緊湊型氣?ADVU-40-5-P-A
156620 雙作用緊湊型氣  ADVU-32-25-A-P-A
156526 雙作用緊湊型氣  ADVU-25-25-P-A
156555 雙作用緊湊型氣  ADVU-50-40-P-A
156556 雙作用緊湊型氣  ADVU-50-50-P-A
156520 雙作用緊湊型氣  ADVU-20-40-P-A
156523 雙作用緊湊型氣  ADVU-25-10-P-A
156536 雙作用緊湊型氣  ADVU-32-40-P-A
156547 雙作用緊湊型氣  ADVU-40-50-P-A
188129 單作用螺紋氣缸  AEVC-20-10-I-P-A
156505 雙作用緊湊型氣  ADVU-12-30-P-A
156510 雙作用緊湊型氣  ADVU-16-20-P-A
156619 雙作用緊湊型氣  ADVU-32-20-A-P-A
156521 雙作用緊湊型氣  ADVU-20-50-P-A
5079 雙作用氣缸      DSN-25-80-P
189469 微型導(dǎo)向驅(qū)動(dòng)器  DFC-10-15-P-A-GF
170835 中型導(dǎo)向驅(qū)動(dòng)器  DFM-16-30-P-A-GF
170836 中型導(dǎo)向驅(qū)動(dòng)器  DFM-16-40-P-A-GF
170842 中型導(dǎo)向驅(qū)動(dòng)器  DFM-20-30-P-A-GF
161147 雙作用多位氣缸  ADVUP-25-    -P-A
156517 雙作用緊湊型氣  ADVU-20-20-P-A
10410 雙電控電磁閥    JMFH-5-1/4
6680 與門            ZK-1/8-B
6817 基本閥，面板    SV-3-M5
173134 電磁閥          MEH-5/2-5,0-L-B
4527 電磁線圈        MSFG-24DC/42AC
5755 延時(shí)閥          VZ-3-PK-3
8823 雙氣控閥        JH-5-1/8
6228 雙電控電磁閥    CJM-5/2-1/2-FH
3527 氣源安全啟動(dòng)閥  ZSB-1/8
5754 延時(shí)閥          VZO-3-PK-3
10773 可調(diào)式壓力開關(guān)  PEV-1/4-B
6685 與門            ZK-PK-3
14660 電控閥          MEH-3-0,9
153491 減壓閥          LRMA-1/8-QS-6
153497 減壓閥          LRMA-QS-8
153496 減壓閥          LRMA-QS-6
151215 單向節(jié)流閥      GR-1/8-B
2094 旋轉(zhuǎn)分氣塊      GF-1/4
170681 氣源安全啟動(dòng)閥  HE-D-MINI
173433 雙電控電磁閥    JMEH-5/2-1/8-P-B

YSR-12-12
YSR-16-20
YSR-20-25
YSR-25-40
YSR-32-60
YDR-16-20
YDR-20-25
YDR-25-40
YDR-32-60
YSR-5-5-C
YSR-7-5-C
YSR-25-40-C
YSR-32-60-C
YSRW-5-8
YSRW-7-10
YSRW-8-14
YSRW-10-17
YSRW-12-20
YSRW-16-26
YSRW-20-34
YSR-10-10-C
SPC11-POT-TLF
SPC11-POT-LWG
SPC11-MTS-AIF
DG-GA-25-YSR
DG-GA-32-YSR
DG-GA-40-YSR
YD-70
YD-140
YD-250
YSR-8-8-C
YSR-12-12-C
YSR-16-20-C
YSR-20-25-C
DGEA-18-YSR
DGEA-25-YSR
DGEA-40-YSR
DG-GA-18-YSR
SPC11-POT-TLF-ASI
SPC11-POT-LWG-ASI
SPC11-MTS-AIF-ASI
SPC11-INC
YSR-4-4-C
YSRW-DGC-8
YSRW-DGC-12
YSRW-DGC-18-GF
YSRW-DGC-18-KF
YSRW-DGC-25-GF
YSRW-DGC-25-KF
YSRW-DGC-32-GF
YSRW-DGC-32-KF
YSRW-DGC-40-GF
YSRW-DGC-40-KF
YSRW-DGC-63-GF/KF
DYSC-5-5-Y1F
DYSC-7-5-Y1F
DYSC-8-8-Y1F
DYSC-12-12-Y1F
DYSW-4-6-Y1F
DYSW-5-8-Y1F
DYSW-7-10-Y1F
DYSW-8-14-Y1F
DYSW-10-17-Y1F
DYSW-12-20-Y1F
DYEF-M4-Y1F
DYEF-M5-Y1F
DYEF-M6-Y1F
DYEF-M8-Y1F
DYEF-M10-Y1F
DYEF-M12-Y1F
DYEF-M14-Y1F
DYEF-M16-Y1F
YSRW-DGC-50-GF/KF
 

YSR-8-8-C液壓緩沖器