screw thread
screw-thread的词性:n.(名词)
1. The continuous helical groove on a screw or on the inner surface of a nut.螺纹:螺丝上或螺帽内部表面上的连续螺形刻痕
2. One complete turn of a screw thread.螺纹的一圈:完成一个螺丝螺纹旋转的东西