延長液壓元件的使用壽命 。 開式油箱頂部應設置空氣濾清器以及注油器?？諝鉃V清器的過濾精度應與系統(tǒng)精度要求相符合?？諝鉃V清器的壓力損失應不影響液壓系統(tǒng)的正常工作。 開式系統(tǒng)：泵所輸出的壓力油在完成做功任務后從執(zhí)行駛器返回油箱。

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