Is the threaded portion of the spare tailshaft well coated with paint?
备用尾轴的螺纹部分涂漆了吗？
To prolong the longevity of the tailshaft sealing, here we introduce a newly refitted tailshaft sealing by analysing its structure.
通过分析某船艉轴密封的构造，为提高其使用寿命，改装设计了一种新型艉轴密封装置。
To prolong the longevity of the tailshaft sealing, here we introduce a newly refitted tailshaft sealing by analysing its structure.
通过分析某船艉轴密封的构造，为提高其使用寿命，改装设计了一种新型艉轴密封装置。
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