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pigging
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pigging
管道清管
利用清管器对管道从一端向另一端清扫管腔内积水、焊渣、泥沙等有害物质及杂物的过程。
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calcium content
calcium cyanamide
calcium cyanide
calcium cycling
calcium fertilizer
calcium flocculus
calcium fluoride
calcium fluoride structure
calcium-glazed ceramics of Han Dynasty
calcium hydride
calcium hydroxide
calcium hypochlorite
calcium imaging in vivo
calcium-induced calcium release,CICR
calcium ion induced transformation
calcium isotope hydrogeology
calcium line
calcium magnesium phosphate coated ammonium bicarbonate
calcium metallurgy
calcium mobilizing hormone
calcium network
calcium nitrate anhydrous
calcium nutrition
calcium nutrition in plant
calcium oxide
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