推进器叶螺旋桨叶等的叶背上表面与 face 相反后卫船的龙骨反向的 reciprocal风逆时针转向与 veer 相反
The upper surface of the blades of the thruster blades, propeller blades, etc. is opposite to the face, the keel of the rear guard ship is opposite to the reciprocal wind, and the counterclockwise direction is opposite to the veer
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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