旁通是联接支管和毛管的专用工具,到目前为止,国内外通用的旁通有两种形式。一种是双翼式旁通,这种旁通由主体和双翼两部分组成,使用时将主体一端插入支管用铅丝将双翼牢固地绑扎在支管上。第二种是具有锁紧螺帽的旁通,使用时将主体插入支管后用锁紧螺帽将胶圈压紧。 Bypass is a special tool for connecting manifolds and tubes. So far, there are two types of common bypass at home and abroad. One is the bifilar bypass, the bypass by the main body and wings of two parts, the use of one end of the main body will be inserted into the branch with a lead wire to bind the wings securely on the branch pipe. The second is a bypass with a lock nut, the use of the main body into the branch pipe with a lock nut to squeeze the rubber ring.