船舶推进器已经被研究了很长时间，船用螺旋桨是船舶最重要的推进器。但是，直到现在，船用螺旋桨的设计和绘制仍然是很困难的。
The design and drawing of ship screws is being studied for long time and the propeller is the most important ship impeller.
该新型推进器适合于各种工程船舶，例如拖轮、顶轮、浮动起重船、挖泥船、渡轮、作业用平底船等，具有广阔的市场应用前景和军事意义。
This new type propeller which fit for various vessels such as tugboat, float lifting boat, excavating boat, ferry boat, flat bottom boat and so on has extensive market prospect and military purpose.
船舶用的甲板起重机械（绞车）、船头门、舱壁阀、船尾推进器等；
The ships deck hoisting machinery such as bow gate, bulkhead valve, stern propeller and so on;
“帆船”一词，指任何使帆的船舶，如果装有推进器但不在使用。
The term "sailing vessel" means any vessel under sail provided that propelling machinery, if fitted, is not being used.
如须避免碰撞或须留有更多时间来估计局面，船舶应当减速或者停止或倒转推进器把船停住。
If necessary to avoid collision or allow more time to assess the situation, a vessel shall slacken her speed or take all way off by stopping or reversing her means of propulsion.
如须避免碰撞或须留有更多时间来估计局面，船舶应当减速或者停止或倒转推进器把船停住。
If necessary to avoid collision or allow more time to assess the situation, a vessel shall slacken her speed or take all way off by stopping or reversing her means of propulsion.
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