These seamen, with high quality, strong obedience consciousness, and hardship endurance, can actively assist ship owners' work.

这些船员素质高，服从意识强，吃苦耐劳、能积极主动配合船东工作。

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Endurance cracks may appear in the hull structure at different ship-ages for some ships, especially at the vessel bottom and the longitudinal bone on board side.

有些船舶在不同的船龄阶段，在船体结构上出现疲劳裂纹，特别是在船底、舷侧纵骨中较为突出。

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