... 作用安全性：work safety 左旋螺丝：left handed screw 左旋(同分)异构体：laevoisomer ...
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... left handed rope 左搓绳 left handed screw 左旋螺旋桨 left handed 左旋的;左手的;左撇子 ...
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... left handed screw 左旋螺旋桨 ; 左旋螺丝 ; 左手螺旋 left hand screw 左螺旋 ; 左旋 ; 左转螺钉 Left-hand screw 左旋螺纹 ...
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left-handed screw 左旋螺杆 ; 左旋螺钉 ; 左转螺旋 ; 左旋螺杆左旋螺钉左旋螺旋桨
left-handed screw nut 左螺帽
left-handed screw bar 左旋螺杆
left handed screw cover 左利手用螺旋握手盖
left-handed screw axis 左旋螺旋轴
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The screw is of modular design and its active part consists of two identical screws that are common screw element and left-handed screw element with shallow grooves.
其螺杆为积木式结构，通常由芯轴和装在其上的正螺纹元件和浅开槽反向螺纹元件组成。
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