?4WRZ10E50-7X/6EG24N9EK4/V+Z4 4

?HSZ16B557-3X/5-100YM01 7

?DA6VP2-40/200-17M 2

R911279429 DKC01.3-100-7-FW（需配以下固化軟件） 2

R911285655 FWA-ECODR3-SMT-02VRS-MS 2

?A7V028DR/63R-NZB01 1

?A4VSO-250E02/30R-PPB13N00 1

?DB10-2-52/200 S16 2

?DB10-2-5X/200 2

?DBW10B2-5X/315U6AG24NK4 1

?DBW10B2-5X/315U6EG24N9K4 1

?DBW10B2-5X/100U6AG24NK4 2

?DBW10B2-5X/100U6EG24N9K4 2

?DBW30B2-5X/100U6AG24NK4 1

?DBW30B2-5X/100U6EG24N9K4 1

?4WEH25J6X/6EG24N9ETS2K4 1

?H-4WEH25J6X/6EG24N9ETS2K4 1

?A10VS0140DFEH/31R-PPB12KC5 2

?PV7-2X/20-20RA0-10 1

?PV7-2X/20-20RA01MA0-10 ?1

?DBW10A1-5X/100-6EG24N9K4 1

?4WRKE 10 W8-50L-3X/6EG24ETK31/F1D3M 3

?4WRTE 16 W8-125L-4X/6EG24ETK31/A1M 3

?A4VG56ER201/32R-NZC02F005SH 1

?A4VG56EP2D1/32R-NZC02F005SH 1

?SL10GB1-4X/V 2

?3DREP6C-2X/25G24Z4V 4

?3DREP6C-2X/25EG24N9K4/V 4

?4WRZ10E50-7X/6EG24N9EZ4/V 4

?4WRZ10E50-7X/6EG24N9EK4/V+Z4 4

?DBDS20K1X/20 2

?DBDS20K1X/200 2

?4WRAE10E1-60-2X/G24N9K31/F1V 2

R900902183 AGEV1-12502-FA/HM/H 1

?A4VG56ER201/32R-NZC02F005SH 1

?A4VG56EP2D1/32R-NZC02F005SH 1

?4WRZ10E50-7X/6EG24N9EZ4/V 4

?4WRZ10E50-7X/6EG24N9EK4/V+Z4 4

R901066141 ABZMS-36-1X/0370M-T70F-K24 1

溫度傳感器 AB31-17/0300MS-M-K14 1

?A10VS0140DFEH/31R-PPB12KC5 2

?PV7-2X/20-20RA0-10 1

?PV7-2X/20-20RA01MA0-10 ?1

?DBW10A1-5X/100-6EG24N9K4 1

R900960681 ?1

?VT-DFPE-A-21/G24K0/0A1V/D V-014 1

R900720216 VT-DFPE-A-2X/G24K0/0A1V/V-014 1

?HED40P15B/350Z14L220S 2

?HED80P-2X/350K14S+PLUG 2

?0820 0340 161 1

?0 822 393 202 1

?HED40H10/5215L2205 2

?A4VSO125DR/30R-PPB13N00 2

0821 302 401 ?4

5/2電磁閥 581-329-065-0/G24/130-GR3 28

閥 4WRPEH6C3B40L-2X/G24K0/F1M ? 2

閥 4WE6G73-62/EG205N9K4/A12 ? 2

閥 3DREPE6C-20/25EG24N9K31/A1V 1

變量泵 ?A10VSO140DFR1/31L-PSD62K02 ?1

變量泵 A10VSO45DFR1/31R-PPA12N00 SO 2

閥 DRE6-10/100MG24K4M ? ? ?2

泵 E-A10VS070DFR/31R-PPA12N00 1

?E-A10VS071DR/31R-PPA12N00 1

?0820 059 460 2

?0810 091 227 2

?R901068595 2

?0810 091 242 2

?R9011068630 2

?4WE10L 40/CG24N9DJL1 1

?H-4WEH25D65/6EG24N9ESDL1/B10 1

?DBW30B1-52/100-6EG24N9DL 1

?DBW10B1-52/350-6EG24N9DL 1

?4WE10E-40/CG24N9DJL1 1

當(dāng)泵為蓄能器重液時(shí)，液壓信號(hào)同時(shí)作用于小閥芯的右端，當(dāng)蓄能器的充液壓力達(dá)到由調(diào)壓彈簧調(diào)定壓力所確定的最大值P2時(shí)，先導(dǎo)閥芯動(dòng)作、P-N連通，蓄能器停止充液。隨著油液的減少、蓄能器的油壓降為p 時(shí)，先導(dǎo)閥芯在調(diào)壓彈簧的作用下復(fù)位、P—N 斷開(kāi)、P—SP連通，蓄能器變?yōu)槌湟籂顟B(tài)。利用先導(dǎo)閥小閥芯 (直徑 d)及大閥芯 (直徑D)的面積不同以及調(diào)壓彈簧的彈簧力F可將蓄能器的油壓控制在P～P 之間。其關(guān)系式為電磁換向閥： 3WE6A6X/EG24N9K4 3WE6A6X/EW220RN9K4 3WE6A6X/EG24NZ5L 3WE6A6X/EW220-50NZ5L 3WE6B6X/EG24N9K4 3WE6B6X/EW220RN9K4 3WE6B6X/EG24NZ5L 3WE6B6X/EW220RNZ5L 4WE6C6X/EG24N9K4 4WE6C6X/EW220RN9K4 4WE6C6X/EG24NZ5L 4WE6C6X/EW220RNZ5L 4WE6D6X/EG24N9K4 4WE6D6X/EG24NZ5L 4WE6D6X/EW220N9K4 4WE6D6X/EW220RNZ5L 4WE6D6X/EG24N9K4 4WE6D6X/EG24NZ5L 4WE6D6X/OFEG24N9K4 4WE6D6X/OFEG24NZ5L 4WE6D6X/OFEW220N9K4 4WE6D6X/OFEG24NZ5L 4WE6E6X/EG24N9K4 4WE6E6X/EG24NZ5L 4WE6E6X/EW220N9K4 4WE6E6X/EW220RNZ5L 4WE6EA6X/EG24N9K4 4WE6EA6X/EG24NZ5L 4WE6EA6X/EW220N9K4 4WE6EA6X/EW220RNZ5L 4WE6EB6X/EG24N9K4 4WE6EB6X/EG24NZ5L 4WE6EB6X/EW220N9K4 4WE6EB6X/EW220RNZ5L 4WE6F6X/EG24N9K4 4WE6F6X/EG24NZ5L 4WE6F6X/EW220N9K4 4WE6F6X/EW220RNZ5L 　4WE6FA6X/EG24N9K4 4WE6FA6X/EG24NZ5L 4WE6FA6X/EW220N9K4 4WE6FA6X/EW220RNZ5L 4WE6FB6X/EG24N9K4 4WE6FB6X/EG24NZ5L 4WE6FB6X/EW220N9K4 4WE6FB6X/EW220RNZ5L 　4WE6G6X/EG24N9K4 4WE6G6X/EG24NZ5L 4WE6G6X/EW220N9K4 4WE6G6X/EW220RNZ5L 　4WE6GA6X/EG24N9K4 4WE6GA6X/EG24NZ5L 4WE6GA6X/EW220N9K4 4WE6GA6X/EW220RNZ5L 4WE6GB6X/EG24N9K4 4WE6GB6X/EG24NZ5L 4WE6GB6X/EW220N9K4 4WE6GB6X/EW220RNZ5L 　4WE6H6X/EG24N9K4 4WE6H6X/EG24NZ5L 4WE6H6X/EW220N9K4 4WE6H6X/EW220RNZ5L 　4WE6HA6X/EG24N9K4 4WE6HA6X/EG24NZ5L 4WE6HA6X/EW220N9K4 4WE6HA6X/EW220RNZ5L 4WE6HB6X/EG24N9K4 4WE6HB6X/EG24NZ5L 4WE6HB6X/EW220N9K4 4WE6HB6X/EW220RNZ5L 　4WE6J6X/EG24N9K4 4WE6J6X/EG24NZ5L 4WE6J6X/EW220N9K4 4WE6J6X/EW220RNZ5L 　4WE6JA6X/EG24N9K4 4WE6JA6X/EG24NZ5L 4WE6JA6X/EW220N9K4 4WE6JA6X/EW220RNZ5L 4WE6JB6X/EG24N9K4 4WE6JB6X/EG24NZ5L 4WE6JB6X/EW220N9K4 4WE6JB6X/EW220RNZ5L 　4WE6L6X/EG24N9K4 4WE6L6X/EG24NZ5L 4WE6L6X/EW220N9K4 4WE6L6X/EW220RNZ5L 　4WE6LA6X/EG24N9K4 4WE6LA6X/EG24NZ5L 4WE6LA6X/EW220N9K4 4WE6LA6X/EW220RNZ5L 4WE6LB6X/EG24N9K4 4WE6LB6X/EG24NZ5L 4WE6LB6X/EW220N9K4 4WE6LB6X/EW220RNZ5L 　4WE6M6X/EG24N9K4 4WE6M6X/EG24NZ5L 4WE6M6X/EW220N9K4 4WE6M6X/EW220RNZ5L 　4WE6MA6X/EG24N9K4 4WE6MA6X/EG24NZ5L 4WE6MA6X/EW220N9K4 4WE6MA6X/EW220RNZ5L 4WE6MB6X/EG24N9K4 4WE6MB6X/EG24NZ5L 4WE6MB6X/EW220N9K4 4WE6MB6X/EW220RNZ5L 　4WE6P6X/EG24N9K4 4WE6P6X/EG24NZ5L 4WE6P6X/EW220N9K4 4WE6P6X/EW220RNZ5L 　4WE6PA6X/EG24N9K4 4WE6PA6X/EG24NZ5L 4WE6R6X/EW220RNZ5L 　4WE6RA6X/EG24N9K4 4WE6RA6X/EG24NZ5L 4WE6RA6X/EW220N9K4 4WE6RA6X/EW220RNZ5L 4WE6RB6X/EG24N9K4 4WE6RB6X/EG24NZ5L 4WE6RB6X/EW220N9K4 4WE6RB6X/EW220RNZ5L 4WE6T6X/EG24N9K4 4WE6T6X/EG24NZ5L 4WE6T6X/EW220N9K4 4WE6T6X/EW220RNZ5L 　4WE6TA6X/EG24N9K4 4WE6TA6X/EG24NZ5L 4WE6TA6X/EW220N9K4?：DA和DAW系列先導(dǎo)式截止閥，有10通徑、25通徑和32通徑幾種規(guī)格，最高工作壓力315 bar，最大流量240 L/min。

特點(diǎn)：

用于底板安裝；

用于油路塊安裝；

4種調(diào)節(jié)元件；

帶護(hù)罩六角套筒螺釘；

帶鎖有刻度旋鈕；

不帶鎖有刻度旋鈕；

4種壓力范圍；

通過(guò)安裝在閥上的方向閥電磁卸荷。

DA6VP2-41/200-17M?

力士樂(lè)原裝閥價(jià)格非常優(yōu)勢(shì)，歡迎來(lái)電咨詢！

?R900596908 DA10-2-5X/315-10 (Bosch

R900596998 DA10-2-5X/315-17 (Bosch )

R900596761 DA20-2-5X/100-17 (Bosch )

R900597135 DA20-2-5X/200-17 (Bosch )

R900590621 DA20-2-5X/315-17 (Bosch )

DA10-2-5X/100-10

DA10-2-5X/100-17

DA10-2-5X/100-FSY

DA10-2-5X/160-17Y

DA10-2-5X/200-10

DA10-2-5X/200-10Y

DA10-2-5X/200-17

DA10-2-5X/200-17Y

DA10-2-5X/200-FS

DA10-2-5X/200-FSY

DA10-2-5X/315-10

DA10-2-5X/315-17

DA10-2-5X/315-17Y

DA10-2-5X/315-FSB07

DA10-2-5X/50-FS

DA10-3-5X/315-10

DA20-1-5X/100-10

DA20-2-5X/100-10Y

DA20-2-5X/100-17Y

DA20-2-5X/100-FSB07

DA20-2-5X/200-10

DA20-2-5X/200-17

DA20-2-5X/200-17SO14

DA20-2-5X/200-17Y

DA20-2-5X/200-FS

DA20-2-5X/315-FSB07

DA20-3-5X/200-17

DA20-3-5X/315-17

DA30-2-5X/315-FSB07

DA6VA2-4X/100-10M

DA6VA2-4X/100-17M

DA6VA2-4X/200-10M

DA6VA2-4X/200-17M

DA6VA2-4X/315-17M

DA6VP2-4X/100-10M

DA6VP2-4X/100-17M

DA6VP2-4X/200-10M

DA6VP2-4X/200-17M

DA6VP2-4X/315-10M

DA6VP2-4X/315-17M

DA6VP3-4X/100-17M

DA6VP3-4X/200-10M

DA6VP3-4X/315-10M

DA6VP3-4X/315-17M

DAC2-5X/100-17

DAC2-5X/200-10

DAC2-5X/315-17

DAC2-5X/315-17Y

DAC30-2-5X/315-17

DB10G1-4X/100W65

DB10G1-4X/100UW65

DB10G1-4X/100XW65

DB10G1-4X/100YW65

DB10G1-4X/200W65

DB10G1-4X/200/12W65

DB10G1-4X/200VW65

DB10G1-4X/200X/5W65

DB10G1-4X/200XYW65

DB10G1-4X/200YW65

DB10G1-4X/315W65

DB10G1-4X/315XW65

DB10G1-4X/315YW65

DB10G1-4X/315YVW65

DB10G1-4X/350W65

DB10G1-4X/350XW65

DB10G1-4X/50W65

DB10G1-4X/50UW65

DB10G1-4X/50YW65

DB10G2-4X/100W65

DB10G2-4X/100-80W65

DB10G2-4X/100UW65

DB10G2-4X/100VW65

DB10G2-4X/100XW65

DB10G2-4X/100YW65

DB10G2-4X/200W65

DB10G2-4X/200-120W65

DB10G2-4X/200-180W65

DB10G2-4X/200JW65

DB10G2-4X/200P155YW65

DB10G2-4X/200VW65

DB10G2-4X/200V/12W65

DB10G2-4X/200XW65

DB10G2-4X/200XJW65

DB10G2-4X/200XUW65

DB10G2-4X/200XVW65

DB10G2-4X/200XYW65

DB10G2-4X/200YW65

DB10G2-4X/315W65

DB10G2-4X/315/2W65

DB10G2-4X/315-250W65

DB10G2-4X/315VW65

DB10G2-4X/315XW65

DB10G2-4X/315XJW65

DB10G2-4X/315XYW65

DB10G2-4X/315XYUW65

DB10G2-4X/315YW65

DB10G2-4X/350W65

DB10G2-4X/350-320W65

DB10G2-4X/350VW65

DB10G2-4X/350XW65

DB10G2-4X/350XYW65

DB10G2-4X/350YW65

DB10G2-4X/350YJW65

DB10G2-4X/50W65

DB10G2-4X/50/12W65

DB10G2-4X/50UW65

DB10G2-4X/50UVW65

DB10G2-4X/50VW65

DB10G2-4X/50XW65

DB10G2-4X/50XVW65

DB10G2-4X/50XYW65

DB10G2-4X/50XYUW65

DB10G2-4X/50YW65

DB10G2-4X/50YUW65

DB10G2-4X=200W65

DB10G2-5X/200

DB10G2-5X/50Y

DB10G3-4X/100W65

DB10G3-4X/100XYW65

DB10G3-4X/100YW65

DB10G3-4X/200W65

DB10G3-4X/200XW65

DB10G3-4X/200YW65

DB10G3-4X/315W65

DB10G3-4X/315XW65

DB10G3-4X/350W65

DB10G3-4X/50W65

DB10G3-4X/50VW65

DB10G3-4X/50YW65

DB10G7-4X/200W65

DB10G7-4X/200XW65

DB10G7-4X/315XUVW65

DB10G7-4X/315XYW65

DB10G7-4X/315XYUVW65

DB10K2-3X/315V

DB10K2-4X/100P060YV

DB10K2-4X/100P070YV

DB10K2-4X/100P080Y

DB10K2-4X/100XY

DB10K2-4X/100YJV

DB10K2-4X/200-180Y

DB10K2-4X/200-180YV

DB10K2-4X/200XY

DB10K2-4X/315XY

DB10K2-4X/315YJ

DB10K2-4X/315YJV

DB10K2-4X/350XYV

DB10K2-4X/350Y

DB10K2-4X/50P10YV

DB10K2-4X/50P25YV

DB10K2-4X/50YJ

DB10K7-4X/100XY

DB10K7-4X/100Y

DB10K7-4X/315-225Y

DB10-.-4X/...W65

DB10-1-4X/100W65

DB10-1-4X/100/12W65

DB10-1-4X/100UW65

DB10-1-4X/100V/12W65

DB10-1-4X/100XW65

DB10-1-4X/100XYW65

DB10-1-4X/100YW65

DB10-1-4X/200W65

DB10-1-4X/200/12W65

DB10-1-4X/200UW65

DB10-1-4X/200VW65

DB10-1-4X/200XW65

DB10-1-4X/200XUW65

DB10-1-4X/200XYW65

DB10-1-4X/200XYUW65

DB10-1-4X/200Y/12W65

DB10-1-4X/200YVW65

DB10-1-4X/315W65

DB10-1-4X/315MKW65

DB10-1-4X/315UW65

DB10-1-4X/315VW65

DB10-1-4X/315XW65

DB10-1-4X/315X/12W65

DB10-1-4X/315XUW65

DB10-1-4X/315XYW65

DB10-1-4X/350W65

DB10-1-4X/350VW65

DB10-1-4X/350XW65

DB10-1-4X/350XYW65

DB10-1-4X/50W65

DB10-1-4X/50-25W65

DB10-1-4X/50UW65

DB10-1-4X/50XUW65

DB10-1-4X/50XYW65

DB10-1-4X/50XYUW65

DB10-1-4X/50YW65

DB10-1-5X/100

DB10-1-5X/200

DB10-1-5X/315

DB10-1-5X/315X

DB10-2-4X/100W65

DB10-2-4X/100/12W65

DB10-2-4X/100-100VW65

DB10-2-4X/100VW65

DB10-2-4X/100V/12W65

1DR30G20S-100BAR?

1DR30G20S-150BAR?

1DR30G20S-160BAR?

1DR30G20S-189BAR?

1DR30G20S-190BAR?

1DR30G20S-192BAR?

1DR30G20S-210BAR?

1DR30G20S-50BAR?

1DR30G20S-63BAR?

1DR30G20S-80BAR?

1DR30G20S-86BAR?

1DR30G20S-SP120BAR?

1DR30-G-20S-SP145BAR?

1DR30G20S-SP180BAR?

1DR30G20S-SP2100?

1DR30G20S-SP3045?

1DR30G40S?

1DR30G40S-170BAR?

1DR30G40S-180BAR?

1DR30G40S-210BAR?

1DR30G40S-230BAR?

1DR30G40S-250BAR?

1DR30P10S?

1DR30P10S-100BAR?

1DR30P10S-145BAR?

1DR30P10S-14BAR?

1DR30P10S-22BAR?

1DR30P10S-300BAR?

1DR30P10S-40BAR?

1DR30P10S-41.5BAR?

1DR30P10S-55BAR?

1DR30P10S-56BAR?

1DR30P10S-70BAR?

1DR30P10S-76BAR?

1DR30P10S-80BAR?

1DR30P10S-90BAR?

1DR30P10SSP16BAR?

1DR30P10S-SP22BAR?

1DR30P10S-SP30BAR?

1DR30-P-10S-SP35BAR?

1DR30P10SSP-45?

1DR30P10S-SP60BAR?

1DR30-P-10S-SP7BAR?

1DR30P10SV?

1DR30P10SV-25BAR?

1DR30-P-10SV-70BAR?

1DR30P20S?

1DR30P20S-100BAR?

1DR30P20S-110BAR?

1DR30P20S-115BAR?

1DR30P20S-120BAR?

1DR30P20S-145BAR?

1DR30P20S-150BAR?

1DR30P20S-170BAR?

1DR30P20S-180BAR?

1DR30P20S-186BAR?

1DR30P20S-190BAR?

1DR30P20S-195BAR?

1DR30P20S-200BAR?

1DR30P20S-205BAR?

1DR30P20S-210BAR?

1DR30P20S-215BAR?

1DR30P20S-220BAR?

? ? ?則 ? ?R900246663 ?DBAW25BF2-2X/200-6EG24N9K4A08

R900751950 ?DBAW15AH2-2X/315-6EG24N9K4

R900773252 ?DBAW25BF2-2X/200-6EG24N9K4A08E

R900916662 ?DBA30F2-2X/200

R900916664 ?DBA30H2-2X/200

R900916665 ?DBA30H2-2X/315

R900940061 ?DBA30H2-2X/350

R900940062 ?DBAW15BF2-2X/315-6EG24N9K4

R900940064 ?DBAW25BF2-2X/315-6EG24N9K4

R900940066 ?DBAW15BH2-2X/350-6EG24N9K4

R900940067 ?DBAW25BH2-2X/350-6EG24N9K4

R900940237 ?DBAEE25BF2-2X/315G24K31A08

R900940735 ?DBAEE30BH2-2X/315G24K31A08

R900944106 ?DBAW25BF2-2X/315-6EG24N9K4A08

R900946144 ?DBAW15BF2-2X/200-6EG24N9K4A08

R900950572 ?DBAW15BF2-2X/315Z6EG24N9K4A08

R900952693 ?DBAW30BH2-2X/315-6EG24N9K4A08

R900957485 ?DBAW30BH2-2X/315-6EG24N9K4

R900958782 ?DBAW25BH2-2X/315-6EG24N9K4

R900960311 ?DBAW25BF2-2X/200-6EG24N9K4

R900961328 ?DBA30H3-2X/200

R900964399 ?DBAW15BH2-2X/315-6EG24N9K4

R900965997 ?DBA25H2-2X/315

R900969190 ?DBAW25BF2-2X/100-6EG24N9K4V

R900969376 ?DBAW25BH2-2X/200-6EG24N9K4

R900973755 ?DBAEE30BH2-2X/200G24K31A08

R901001067 ?DBAW15BF2-2X/200U6EG24N9K4A08

R901021877 ?DBAW30BF2-2X/200U6EG24N9K4

R901046755 ?DBAW30BH2-2X/315ZZ6EG24N5K4A08

R900244092 ?DBAWR40BH2N1X/315US6EG24N9K4R12

R900551603 ?DBAR25F2-1X/315

R900727712 ?DBAWR30BH2N1X/200S6EG24N9K4R12

R900738371 ?DBAW40BF2N1X/50-6EG24N9K4

R900764231 ?DBAWR30BH2-1X/315S6EG24N9K4R12

R900918709 ?DBA30H2N1X/315

R900919072 ?DBA40H2N1X/315

R900929770 ?DBAWR30BH2N1X/315U6EG24N9K4

R900931102 ?DBAW40BH2N1X/315-6EG24N9K4

R900937215 ?DBAW30AH2N1X/315-6EG24N9K4

R901007532 ?DBAWR30BH2N1X/200S6EG24N9K4R12D

R901007535 ?DBAWR30BH2N1X/350S6EG24N9K4R12D

R901018591 ?DBA30H2-1X/420P400YVSO650

R901019383 ?DBAWR30BH2N1X/200-6EG24N9K4VE

R901019531 ?DBAWR30BH2N1X/200-6EG24N9K4VD

R901107555 ?DBAWR30BH2N1X/200YS6EG24N9K4R12D

R901139718 ?DBAWR30AF1N1X/200-6EG24N9K4R12D

R901139721 ?DBAWR30BH2N1X/200-6EG24N9K4R12D

R901145621 ?DBAWR30BH2N1X/350S6EG24N9K4R12VD

R901220054 ?DBAR30H2N1X/200D

R901286929 ?DBAW40BH1N1X/300-6EG24N9K4E

R901287027 ?DBAW40BH1N1X/270-6EG24N9K4E

R901297863 ?DBAW30BH2N1X/150S6EG24N9K4R12E

R901298509 ?DBAWR40AF2N1X/175-6EG220N9K4R12VEDBA/DBAW/DBAE(E)系列泵用安全閥塊，有16通徑、25通徑和32通徑幾種規(guī)格，最高工作壓力350 ?bar，最大流量400 L/min。?

特點(diǎn)；泵的零壓?jiǎn)?dòng)與旁通；?

直接安裝在泵的SAE壓力油口上；?

油于路徑短，故旁通壓力低；?

壓縮容量小，可平穩(wěn)切換到低壓旁通；?

壓力可迅速建立；?

4個(gè)調(diào)節(jié)元件：旋鈕、帶內(nèi)六角和護(hù)罩的套筒；?

帶刻度的可鎖旋鈕；?

帶刻度的旋鈕；?

5個(gè)壓力等級(jí)；?

因直接安裝在泵上，故噪音較低。