US4357075A
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Confocal reflector system
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US3135851A
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Resistance welding apparatus including a transformer
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US3040162A
|
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Rotary welding apparatus including transformer
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US2561739A
|
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Rotary welding transformer structure
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US2241015A
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Rotary welding transformer
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US1993007A
|
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Voltage regulating means
|
US2014570A
|
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Voltage regulator
|
US1979882A
|
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Rotary welding transformer
|
US1934856A
|
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Rotary welding transformer
|
US1979881A
|
|
Rotary welding transformer
|
US1916218A
|
|
Rotary welding transformer
|
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|
|
Welding transformer
|
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|
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Heating furnace
|
CA399117A
|
|
Rotary welding transformer
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CA677360A
|
|
Rotary resistance welding apparatus particularly for tube mills
|
CA542895A
|
|
Rotary welding transformer
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