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(en )
1981-04-28
Safety control for furnace burner
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(it )
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(en )
2001-02-27
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(en )
1938-12-06
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(en )
1943-09-14
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(enrdf_load_stackoverflow )
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(en )
1980-12-03
Flame failure device
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1931-03-03
Valve structure
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1966-11-29
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2017-04-11
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(en )
1939-05-09
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(en )
1944-11-21
Safety shutoff device
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(en )
1938-04-19
Method of fuel-feed control and apparatus therefor
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(en )
1934-08-28
Gas supply control system
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(en )
1933-09-12
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(en )
1939-07-04
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(ru )
1983-02-28
Устройство дл регулировани газового водонагревател
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2018-04-17
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(en )
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(en )
1936-04-14
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(en )
1954-02-23
Safety control system for gas burners employing single point ignition