COLOR THREAD LEFT INSIDE 藏色线 ; 躲色线

left hand thread 左旋螺纹 ; 反扣 ; 左螺纹 ; 左罗纹

left thread compression screw 左旋空心加压螺钉

left-hand thread tap 左旋螺纹丝锥

color thread end left inside 藏色线

left-hand thread manual tap 左旋螺纹手控丝锥

left-hand thread [机] 反螺纹 ; [机] 左旋螺纹

left-handed thread 左旋螺纹 ; 倒牙

left-hand-thread rod 左丝扣钻杆