head set meaning in English

头戴机
头戴式耳机
头戴送受话器
头带式受话器

Hexagon head set screws with small hexagon and dog point
六角头长圆柱端紧定螺钉
World head set arithmetic figure dvd player be born
世界首台数字dvd播放器出世
Slotted pan head set setscrews with dog point
开槽盘头定位螺钉
Hexagon head set screws with small hexagon and half dog point and flat cone point
六角头短圆截锥端紧定螺钉
Square collar - head set - bolt
方头凸缘端紧定螺栓

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