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逆流洗涤 nìliú xǐdí
chem. back flushing
met. back flush; countercurrent washing
polym. counter current washing
space backflush
tech. counter-current washing; counter-flow washing
逆流〔反向〕洗涤
gen. backflush
逆流 洗 涤
: 8 phrases in 3 subjects
Metallurgy5
Mining1
Technology2