Drain line: the hydraulic components leaked oil into the return pipe or tank.
泄油管路：将液压元件泄露的油液导入回油管或油箱。
The design thought of hydraulic balance type oil tank solved the above problem.
液力平衡式大型油罐的设计思路，较好地解决了上述问题。
The design thought of hydraulic balance type oil tank solved the above problem.
液力平衡式大型油罐的设计思路，较好地解决了上述问题。
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