the connection with the department of the west

摘要

the use of the booth bar device is started. the opening of the side or sides, and in front of the booth bar in order to guide the guide part and the change of the government as a guide, in order to guide the formation of a pair of side, on both sides of the screw part is inserted, in order to allow the the formation of the edge of the groove, a guide part, and the height of the guide part and guide the formation of the government. in this paper, the department of the sea a large area uniform support, and a screw passing through the structure. the duration of the effect.