在原有螺杆式、卷扬式和液压式启闭机的基础上，设计研制了齿销式启闭机。
On the basis of original screw type, winding type and hydraulic type Headstock, a kind of dentate annul headstock is designed and manufactured.
我公司有各种设备198台，主要生产全螺纹螺杆、双头螺柱、圆螺母、吊环、销类等。
My company has a variety of devices 198 Units, mainly the production of full-thread screw, double-headed stud, round nuts, rings, pin and so on.
转动螺杆，螺杆的凸柱压住链条的链条活节销，可以将链条活节销挤出，拆卸链条。
When the screw is rotated, the convex pole of the screw suppresses the chain articulated pin of the chain and shoves the articulated pin to dismantle the chain.
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