Flushing L. O. system of stern tube.

艉轴管滑油系统的投油清洗。

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Conclusion the management system worked well, but there were still weak l...

结论管理体系运行良好，但仍存在薄弱环节。

youdao

Conclusion the management system worked well, but there were still weak l...

结论管理体系运行良好，但仍存在薄弱环节。

youdao