lifeboat engine 中文意思是什麼
lifeboat engine
解釋
救生艇發動機-
How often should you test lifeboat engine ? who takes charge of the operation ? who takes of maintenance and repair work
您多長時間試驗一次救生艇機?誰負責操縱艇機?誰負責維護和修理艇機?
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