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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
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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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white popinac
white poplar
white porcelain
white porcelain double bellied dragon handle bottle
white porcelain made by Dehua kiln
white porcelain made by Ding kiln
white porcelain made by Xing kiln
white porcelain plate decorated with Bogu pattern from the Ding Kiln
white porcelain pot with a dragon handle and rooster head
white porcelain vase with black peony patterns
white pottery
white pottery carved double ear jar with Taotie pattern
White Pottery of the Shang Dynasty
White Propaganda
white propaganda
white pulp
white-pupil echelle spectrometer
White Revolution
white rhinoceroses
white rot
whiteruss
white sardinella
white saxaul
white schist
White Sea
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