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反滤层 fǎnlǜcéng
bridg.constr.	inverted filter protective filter
eng.geol.	filter material; filter pack; filtering layer; loaded filter; protective filter
hydroel.st.	filter; reverse filter; inverted filter; reversed filter
railw.	reverse filtration layer
tech.	inverted gravel layer; pervious bed; reversed filtration layer
water.res.	filter bed; filter layer

反滤层: 30 phrases in 5 subjects

Architecture	1
Ecology	1
Engineering geology	3
Hydroelectric power stations	3
Technology	22