机读格式显示(MARC)

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• 222 _0 |a General & mechanical patents index-AA bulletin.Q5-Q7

• 245 00 |a General & mechanical patents index alerting abstracts bulletin. |n Q5-Q7 |p Mechanical Engineering.

• 260 __ |a London |b Derwent Publications Ltd. |c 1988-94.

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• 785 00 |a Engineering patents index alterting abstracts bulletin. Q5-Q7

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