已经有次观看 wencong在2013-07-03发布
简介：The film details the aluminum tube fixed horizontally GTAW welding, copper plate butt GTAW welding austenitic steels with pearlite steel welding, stainless steel welding and other welding composite technology, teaching film for the real locations, and uses a combination of graphics and animation manifestations, visual image, easy to understand and master.
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