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ＧＴＡ全位置管焊设备──赴法国、美国学习考察中国航天工业总公司长征机械厂（四川６３６４５２）张万春ＧＴＡａｌｌ－ｐｏｓｉｔｉｏｎｔｕｂｅｗｅｌｄｉｎｇｅｑｕｉｐｍｅｎｔ──ＴｏＦｒａｎｃｅａｎｄＡｍｅｒｉｃａｆｏｒａｃａｄｅｍｉｃｒｅｓｅａｒｃｈａｓ...
GTA full position pipe welding equipment ─ ─ to France, the United States study tours China Aerospace Corporation Long March Machinery Factory (Sichuan 636452) Zhang Wanchun GTAall-positiontubeweldingequipment ─ ─ ToFranceandAmericaforacademicresearchas ...