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1974-12-17
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1992-08-11
片側でプレス封止されたハロゲン白熱ランプ
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1959-12-22
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1990-04-04
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1974-12-17
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1955-11-29
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1966-08-09
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1936-09-22
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1980-05-27
Internal shorting fuse for a high-intensity discharge lamp
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2008-09-18
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1942-02-17
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1958-02-18
Auxiliary electrode and shield for a low pressure discharge device
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1943-07-20
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1948-11-02
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1974-11-19
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1975-04-15
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1933-06-27
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1934-04-10
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1960-12-06
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