The connection strength increases with the increasing of bearizing rate of coupler.

连接强度随着耦合器承载率的增加而增加。

The connection strength increases with the increasing of bearizing rate of coupler and thickness of pipe wall, but decreases with the increasing of connection length.

管接头的连接强度随着扩孔率、管壁厚度的增加而升高，但随着连接长度的增大而降低；