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chemical tracer
chem.
示踪原子
;
化学指示
剂
eng.geol.
化学指示剂
met.
化学示踪剂
space
化学指示
;
化学示踪物
chemical tracer:
5 phrases
in 4 subjects
Earth sciences
1
Geophysics
1
Mining
1
Oil / petroleum
2
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