... left-handed screw 左旋螺杆左旋螺钉左旋螺旋桨 left handed screw cover 左利手用螺旋握手盖 right-handed screw 正螺旋 ...
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拖欠行为正螺旋上升。
打破了传统的采用正螺旋叶片设计滚筒，。首次采用倾斜螺旋叶片设计滚筒。
It is the first to use the tilt helical vane to design the drum of the coal_winning machine, which breaks through the traditional drum design ways of the coal_winning machine.
在一个城堡里，我们正沿着很窄的螺旋楼梯往下走，这时，螺旋楼梯突然向中心支撑柱子方向凹陷，我们几乎不约而同地喊了起来。
At one chateau, as we descended a narrow spiral staircase, we both remarked-almost simultaneously-that the staircase sagged inward toward its central support beam.
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