Which one is true as regards to the hard hat according to the passage?()

A . It needs not to be regularly replaced B . It is designed to protect from possible impact C . It is required to be worn on deck at all times by all ships D . fibreglass hardhat should not be used on board shi

时间:2022-10-15 20:14:08 所属题库:船舶电气与船舶安全题库

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