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西文期刊1.World Patents Index Gazette. section Q, mechanical T-18/X31
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Derwent Publications Ltd., 1987
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西文期刊2.World Patents Index Gazette. section Q, mechanical T-18/7X
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Derwent Publications Ltd., 1974-88
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西文期刊3.World Patents Index Gazette. section P, general T-18/8X
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Derwent Publications Ltd., 1988-
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西文期刊4.World Patents Index Gazette. section R, electrical T-18/9X
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Derwent Publications Ltd., 1974-88
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西文期刊5.WPI gazette. S-X, electrical T-18/X27
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Derwent Publications Ltd., 1990-
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西文期刊6.World patents index gazette. Section S-X, Electrical T-18/14X
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Derwent publications Ltd. 1988-
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