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。
New development in ill feet Carnival cruise liner, today the coast guard says the engine room fire that knock down power to the vessel is caused by leaking a few oil return line.
“凯旋嘉年华”号邮轮事故调查有了新进展，今天海岸警卫队表示，致使邮轮发动机室着火并切断邮轮电力的原因是回油管路泄露。
Supervisor Road: including oil suction line, pressure oil pipeline and oil return line, used to achieve the transfer of pressure energy.
主管路：包括吸油管路，压油管路和回油管路，用来实现压力能的传递。
Supervisor Road: including oil suction line, pressure oil pipeline and oil return line, used to achieve the transfer of pressure energy.
主管路：包括吸油管路，压油管路和回油管路，用来实现压力能的传递。
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