mechanically propelled lifeboat的意思|示意

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机械推进救生艇，机械推动的救生艇

机械推进救生艇 ... self-propelled lifeboat 自航救生艇 mechanically propelled lifeboat 机械推进救生艇 hand-propelled lifeboat 手推进救生艇 ...

机械推动的救生艇 ... 机械推动的车辆 mechanically propelled vehicle 机械推动的船只 mechanically propelled vessel 机械推动的救生艇 mechanically propelled lifeboat ...