A4VSG40HD1D/10R-PPB10K019N

A4VSG250HD1P/30R-PPB10G300N

油泵A4VSO180DFR/30R-PPB13N00

A4FO500/30R-PZH25N00

A10VSO140DFLR/31R-PPB12N00

A4VSG40EM2009/10R-PZB10N000N

E-A4VSO125DR/30R-PPB13N00

A4VG71DWDMT2/23L-NZF02F041D

A4VG90HWD2/32R-PZF02F001S

A4VSG250HS/10R-PPB10N00

A2VK28MAOR1GOPE2-S022028554

A4VS071DR/22R-PPB13NOO

AA10VSO140DRG/31R-PKD62N00

A4VSO180EO/30L-P2B13N00

A4VSG250HD1D/30R-PPB10H029N

E-A4VSO250EO2/30R-VPB25N00-SO3

A4VSG250EM3066/30R-PPB10N009N

A4VSG250HS1/30L-PPB10N000N

A4VSG40HS1/10R-PPB10N00

A4VS0125DRG/30R-PPB13N00

A4VG250HD1D1/32LNZD10F001S

A4VG56EZ2DM1/32R-NSC02F013SH

柱塞泵A4VSG750HD/22R-PPH10NOO

A4VG180EP2DT1/32R-NTD02F021S

A4VG125HDM1/32R-NSF02F691S-S

A4VSG71HD1D/10R-PPB10K33ON

A4VSG250HW/30R-PPB10N000N

A10VSO140DFR/31R-PPB12K26

A4VSG250HS1/30R-PPB10N000N

A4VS071DR/30R-PPB13N00

A4VG71EPDT1/32R-NAF02F011S

A4VSG71HD1D/10R-PPB10K33ON

A4VSO40EO/31L-P2BBN00

A4VSG40HS1/10R-PPB10N00

A4VS071DR/30R-PPB13N00

A4VSO71EO2/10R-PPB13NOO

A4VSG250EO2/30R-PPB10H020N

A4VSG71EM3120/10R-PPB10K019N

A4VSO180EO/30L-P2B13N00

A4VSG250HS/10R-PPB10NOO

A4VS0250HD1GB/30R-PZB13K35-S

A4VS040DR/10R-PPB13NOO

A4VS071DR/30R-PPB13N00

A4VG250HD1D1/32R-NSD10F0010

A4VS0250DR/30R-PPB13N00

A4VG125HD1D2/32R-NSF001S

A4VG125HD1P1/32R-N2D10F69

A4VSG40HD1D/10R-PPB10K019N

軸向柱塞泵主泵

柱塞泵A4VSO-250DR/30R-PPB13N00

A4VSO250DFR/30R-PPB13N00

A4VSG250HD1D/30R-PPB10H029N

A4VSG40EM2009/10R-PPB10K310N

閥柱塞泵A4VTG71HW/32R-NLD10F001S

A4VSG250HD1A/30R-PPB10K269N

A4VSG71EO1/10R-PPB10N00

AA10VSO140DRG/31R-PKD62N00

A4VG125HDDT1/32L-PZF02F001D

A4VG90HWDL1/32R-NAF02F071L-S+A

A4VSG250EM1007/30R-PPB10H029F

??當由于各種原因，空氣被吸入油液中，或者在油液壓力低于大氣壓時，溶解在油液中的部分空氣就會析出形成氣泡，這些氣泡在低壓區時體積較大，當隨油液流到高壓區時，受到壓縮，體積突然變小或氣泡消失；反之，如在高壓區時體積本來較小，而當流到低壓區時，體積突然增大，油中氣泡體積這種急速改變的現象。氣泡體積的突然改變會產生噪聲，又由于這一過程發生在瞬間，將引起局部液壓沖擊而產生振動。先導型溢流閥的導閥口和主閥口，油液流速和壓力的變化很大，很容易出現空穴現象，由此而產生噪聲和振動。。

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