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过滤速度
ecol.	filtration velocity
el.	rate of filtration
met.	filtering rate; filtering velocity; filtration rate
oil	filter velocity
tech.	filter efficiency; filtration speed; media velocity; rating of filtration; speed of filtration
滤清器过滤速度
auto.	filtering speed
过滤速度率
agric.	speed of filtration

过滤速度: 5 phrases in 4 subjects

Ecology	1
Electronics	2
Oil processing plants	1
Technology	1