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煤层甲烷
méicéng jiǎwán
earth.sc.
coal-seam methane
oil
coalbed methane
tech.
coal bed methane
煤层甲烷【气】
méicéng jiǎwán
geol.
coalbed methane
煤层甲烷
:
4 phrases
in 2 subjects
Geology
2
Mining
2
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