头套

It is very important to measure and control the position of bearing hole when machining canular forked shaft.

在叉头套加工过程中,轴承孔位置误差的测量和控制重要。

A physiotherapeutic apparatus for preventing and treating near sighted eye has a convex lens used as objective lens, lens cone, eyepiece, headgear and lens set.

一种防治近视眼的理疗器，它有作为物镜的凸透镜、镜筒、目镜，还有头套和透镜组，它用于人在近距离上长时间用眼时戴在眼上，可以使被视物的像清楚、放大和变远。

Chela hoof of the horse toes step on in disorder before him, place turned 360 degrees circle, his headgear also was bumped to fly by the crupper on the side.

马的脚蹄子就在他蹬，原地转了360度的圈，他的头套也被旁边的马屁股撞飞了。