机床液压系统一般较难直接判断出产生故障的主要原因。
For lathe hydraulic system, it is usually hard to judge the reason of trouble directly.
如果机器产生故障，值班轮机员必须尽快采用有效办法。
If any machine goes wrong, the engineer on duty must take efficient measures as soon as possible.
拖拉机液压系统产生故障的主要原因是液压元件工作性能恶化引起的。
The tractor hydraulic system has the breakdown main reason is the hydraulic pressure part operating performance worsening causes.
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