用油压顶开valve,油压没建立起来时顶杆和lifter之间有空隙就有敲击声,0w油流动性好,油压容易上去。
用油压顶开valve,油压没建立起来时顶杆和lifter之间有空隙就有敲击声,0w油流动性好,油压容易上去。
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