... left-hand crankshaft 左旋曲轴 ; 左侧曲轴 ; 改变行程的曲轴 ; 左式曲轴 left-hand joint 左扣连接 left-hand nut 左转螺母 ...
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left-hand tool joint thread 左旋钻杆接头螺纹
left-hand tool joint 反扣钻杆
left hand loose joint hinge 左边活节合页
·2,447,543篇论文数据，部分数据来源于NoteExpress
To overcome the shortcomings of the shear pin type joint and left-hand thread type joint, a sliding sleeve subsurface safety joint is developed.
为了克服剪钉式和反扣式两种安全接头的不足，研制出一种滑套式井下安全接头。
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The final report of the joint discussion can be accessed from the left-hand menu.
UNESCO: Open Educational Resources
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