228 / | HD | METAL FUSION BONDING |
101 | DF | PROCESS {38} |
141.1 | DF | .~ With shaping {7} |
144 | ![]() | .~.~ And edge joining of one piece blank or strip {4} |
145 | DF | .~.~.~> To form helically seamed tube |
146 | DF | .~.~.~> Progressively bending and joining {1} |
149 | DF | .~.~.~> Uniform thickness thin blank or strip {1} |
152 | DF | .~.~.~> Irregular thick blank or strip |