Semi-auto welding for aluminum bronze workpiece (091030) |
Laser welding for bimetallic pipe (091123) |
Laser welding for knives (091218) |
Welding for large bronze roller (140816) |
Cold welding for knife mould of cobalt admixture (12141009) |
Nitrogenation for crackle of spiral rod (140815) |
Cold welding by wolfram carbonized for corrugated roller(1408273) |
Warming test and record for impeller cold welding (140925) |
Chromium patching test for chromium-plated roller (140816) |
Loophole welding before hard chromium plating on aluminum roller |