screw head meaning in Chinese

螺钉头
螺丝头

Screw head bulb
螺口灯泡
Flat hexagon nuts for nipples and screw heads for electrical tubular heating elements , metal - sheated
带金属护罩的管状电加热器的连接管用的扁平六角螺母
1b ) steel parts must have polished angles and their visible surfaces smoothed down . screw heads have to be polished , with their slots and rims chamfered
所有钢制零件的边缘必须削角、打磨、抛光使其如镜面般光亮。所有螺丝帽的边缘及凹口都要削角抛光，螺丝尾则须做平面或球面抛光。
Currently , we have several dozens of production equipments , including screw heading machines , screw thread rolling machines , nut shaping machines , tapping machines , punching machines and lathes
工厂现拥有螺丝打头机、搓牙机共十多台，螺帽成型机、攻牙机、冲床共十多台，车床、小车床若干。