In connection with characterstics of the equipment, adopt polyteachnic measurs, pull down pipes by cutting in the openings, bring expending tubes cantedly for second time in force by expend-tube teachnic, deal with tr...In connection with characterstics of the equipment, adopt polyteachnic measurs, pull down pipes by cutting in the openings, bring expending tubes cantedly for second time in force by expend-tube teachnic, deal with transformations of super-large and ultrathin tube sheets throngh deformation control, carry out the repipe and repair successly, resolve an insolvable teachnic problem which is considered by the internal and external展开更多
文摘In connection with characterstics of the equipment, adopt polyteachnic measurs, pull down pipes by cutting in the openings, bring expending tubes cantedly for second time in force by expend-tube teachnic, deal with transformations of super-large and ultrathin tube sheets throngh deformation control, carry out the repipe and repair successly, resolve an insolvable teachnic problem which is considered by the internal and external
