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lethal concentration
auto.	有害物质的致命浓度
dril.	极限浓度
oil	致命浓度
pest.contr.	致死浓度
space	化学战剂致命浓度
tech.	LC致死浓度; 毒物致死浓度

lethal concentration: 49 phrases in 17 subjects

Agriculture	5
Animal husbandry	5
Aviation	1
Chemistry	1
Drilling	1
Earth sciences	3
Ecology	2
Electronics	2
Environment	4
General	2
Genetics	1
Hydroelectric power stations	1
Life sciences	2
Oil / petroleum	3
Space	3
Technology	11
Water resources	2