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清洗剂和预膜剂
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清洗剂和预膜剂
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工学
清洗剂和预膜剂
释
cleaning agent and pre-membrane agent
清洗剂和预膜剂
一类具有清洗作用的溶解性化学品称为是清洗剂。在金属表面清洗后加入一定量的水溶解性化合物,能在金属表面预先形成保护膜的一类化学品,称为预膜剂,也称为钝化预膜剂。
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perceived value pricing
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percentage
percentage calculation
percentage diagram
percentage elongation
percentage error
percentage of blocked dregs and soil
percentage of coarse fiber
percentage of controlled soil erosion area
percentage of efficient supplier correct end cocoon
percentage of fatty extraction
percentage of healthy chicks
percentage of length deviation
percentage of overlength fiber
percentage of recovered forestry and grass
percentage of sows showing estrus within 7 days of weaning
percentage point
percentage recovery of gas reservoir
percentage reduction of area
percent for art
percent frequency effect
percentile
percentile deviation
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