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1980-10-01
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1983-11-23
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1980-09-12
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1980-02-06
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1987-01-16
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1974-09-16
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1986-02-07
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1982-07-30
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1985-07-19
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1979-01-15
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1987-03-11
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1978-05-18
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1977-08-16
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1976-01-02
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1985-07-19
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1990-11-30
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1976-11-16
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1989-02-03
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1978-09-08
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1976-05-28
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1977-10-28
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1978-04-15
EXTINCTION CHAMBER FOR ELECTRIC SWITCHES
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1985-07-19
ELECTRIC SWITCH WITH MAGNETIC ARC BLOWING
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1983-03-16
PROCEDURE FOR THE PREPARATION WITH A MATERIAL RESISTANT TO THE ACTION OF AN ELECTRIC ARC.
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1984-02-16
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