Conduit of high pressure, extrahigh voltage natural gas solders the technology
From;    Author:Stand originally
One, the development that preface reachs petro-chemical industry as oil natural gas, with be being enraged on the west east be defeated by a project to be a mark, the length of our country is defeated by conduit to build fastigium to had come. Pipeline of long gas transporting oil more and more carry direction to develop to force of large requirements, high pressure. Long since be defeated by conduit to fall to introduce our country from time of ** century ** to solder technology, through development of a few years, below the handiwork that already had maturity at present to solder technology, popularizing semi-automatic gas to protect solder technology. Full automatic gas protects solder ability...