a. The coupling of connecting pipe elements includes: the first and second parts; the spring component; the fixed component; the combination of preassembly coupling and pipeline element; the related methods. （Divisional request 201803082）。

摘要

Butt joint of connecting pipe elements The butt joint consists of a section and a second section, which receive the tube assembly around a central space from the extreme end to the extreme end. A set of springs holds each part at one end and an adjustable fixing device holds each part at the other end. The spring array shows the position between the silos enough to insert the tube elements into the cavity, which are fixed. The coupling may include a serrated environmental retaining device for connecting the tube elements of the optical pole,Or he might have an archer's key that sticks things together