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critical concentration
el. 极限浓度
wind. 临界浓度
critical concentration
: 40 phrases in 16 subjects
Agriculture6
Chemistry4
Drilling2
Earth sciences1
Ecology1
Electronics5
Explosives and Explosive Ordnance Disposal1
Oil / petroleum3
Oil processing plants1
Plastics1
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Space1
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Technology10
Textile industry1
Water resources1

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