came to held for pipes, pe / fe for gas and water.

摘要

time (1) required for pe / fe pipes for gas and water obtained by peripherally one end (3) of the tube (5) by reducing the diameter of the ferrous material with respect to the remaining part (5) of thetube, performing on the part (3), a plurality of grooves (7) in the teeth of saw, in which sense appropriateputting on the ends (3) of the tube (5) in the ferrous material the ends (9) of the tube (11) in the plastic material to combine with the same and with the junction of the two ends (3) (9)tubes (5) (11) overlapped with a hose (13) of a suitable diameter.