square thread [机] 方螺纹 ; 直角螺纹 ; 矩形螺纹

square thread screw pump 矩形螺杆泵 ; 长方形螺杆泵

screw pump with square thread 方形螺杆泵

square thread tap 方螺丝攻

square-thread form 方螺纹样

square thread screw pump coupling 矩形螺杆泵联轴器

square-thread tool 方螺纹车刀

left-hand square thread 左旋方形螺纹

hand square thread 左旋方形螺纹