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rosin flux
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农学
松香助焊剂
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rosin flux
松香助焊剂
以松香或改性松香为主要活性成分,能够帮助、促进焊接过程,阻止氧化反应并具有保护作用的化学品。
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drilling hydraulics
drilling in coalbed methane
drilling in pressure balance
drilling instrumentation
drilling in surface mining
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drilling mud logging parameters
drilling non-production time
drilling overflow
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Drilling & Production Technology
drilling production time
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