... double-screw mixer 双螺杆混合器 double-screw vessel 双桨船 double-screw bolt 螺柱 ; 双头螺栓 ...
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橡皮艇既可作为排桨船，也能做双桨船 双桨船 (Oar rigs) 双桨船包括一个船架，用于固定大桨，和提供空间给桨手乘坐和放置装备。由一名主桨手用固定在船架上的两支大桨来控制前进方向。
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Usually use the more experience way, or the recommended method of 15th session of the International Towing Tank Conference extended to twin-propeller ship.
比较多的还是采用经验修正的方法,或是将第15届国际拖曳水池会议推荐的方法扩展到双桨船。
参考来源 - 内河双桨船伴流分数尺度效应修正方法的探讨·2,447,543篇论文数据，部分数据来源于NoteExpress
但新近完成的某双桨船的回转试验的多个实测结果表明：外侧螺旋桨负荷远大于内侧螺旋桨负荷。
In recent days, however, several recording results of a new twin-propeller ship gotten in sea trial indicated that the outside propeller's load is always heavier than the inside one.
由于船体的影响，双桨船的螺旋桨处于斜向来流的条件下运转。斜流造成螺旋桨叶工作状态的非定常性。
Because of the influence of the hull, the stern propeller of a twin-screw vessel is working under condition of oblique flow, and the unsteady working condition of the blade of a propeller is created.
他们把船划出去，水鼠拿起双桨，小心翼翼地划着。
They got the boat out, and the Rat took the sculls, paddling with caution.
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