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US3162750A
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Portable welding apparatus
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US3210519A
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Welding apparatus and actuating element
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US3224602A
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Apparatus for manipulating workpieces
|
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US3217136A
|
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Portable welding apparatus
|
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US3172990A
|
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Welding apparatus
|
|
US3182177A
|
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Welding apparatus
|
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US3205396A
|
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Arc welding apparatus
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US3109921A
|
|
Welding apparatus
|
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US3109920A
|
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Welding method and apparatus
|
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US3109918A
|
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Roller resurfacing machine
|
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US3024349A
|
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Roller re-surfacing machine
|
|
US3109919A
|
|
Welding method and apparatus
|
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CA171100A
|
|
Metal tube
|
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CA168541A
|
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Tube welding machine
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CA161253A
|
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Metal tube manufacture
|
|
CA142395A
|
|
Machine for making metal tubes
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|
CA142394A
|
|
Metal tube
|
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US1028039A
|
|
Process of manufacturing metal tubes.
|
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US1027865A
|
|
Continuous tube-mill.
|
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US1027864A
|
|
Continuous process of manufacturing metal tubes.
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