buttress casing thread connection偏梯形套管螺纹接头
buttress casing thread偏梯形套管螺纹
buttress screw thread锯齿形螺纹
screw buttress thread锯齿形螺钉
centering buttress thread自动找中的梯形螺纹
buttress thread form锯齿形螺纹;锯齿形罗纹
buttress screw-thread[机] 锯齿螺纹
API buttress thread casing偏梯型套管
Buttress thread type chain tensioners锯齿螺纹式链条张紧器
N（名词） a screw thread having one flank that is vertical while the other is inclined, and a flat top and bottom: used in machine tools and designed to withstand heavy thrust in one direction 偏梯形螺纹