general inspection of lifesaving appliance [安全] 救生设备到位检查
marking of lifesaving appliance 救生设备标志
equipment of secondary lifesaving appliance 辅助救生装置属具
·2,447,543篇论文数据，部分数据来源于NoteExpress
Advisor's Comments: Controls remotely the ship toy to change fits out the lifesaving appliance to specially enhance the torsion value.
指导老师评语： 以遥控船玩具改专装成救生器具必须提高扭力值。
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