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pollution detection
 pollution detection
eng.geol. 污染探测
| and
 AND
el. ; 逻辑电路"与"
 and
gen. ; ; ;
busin. 以及;
| prevention
 prevention
hydroel.st. 防止
| system
 system
tech. 制度

to phrases
pollution detection
eng.geol. 污染探测
space 污染检测
pollution detection: 9 phrases in 6 subjects
Aviation1
Earth sciences1
Ecology1
Technology3
United States1
Water resources2