positioning pin造句怎么写

RD auto pinning machine is used to make reference positioning pin prior to drill the laminated plates of etched circuit ca rd on drill machine for etched circuit ca rd manufacture premium products.

The positioning pin on the handle can be inserted into three different positioning pins on the back of the toothbrush head base to fix the toothbrush head in three different positions.

The lifting plate is locked automatically by a positioning pin, and then the supporting plate of the pancake is replaced to enable the pancake machine to automatically work again.