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lean gas
gen.
贫
瘦，干，废
煤
气
archit.
贫
煤
气
dril.
★
干气
oil, chem.
贫气
steel.
贫煤气
tech.
低发热量气
指劣质煤气
lean gas
chem.
贫气
lean gas
:
9 phrases
in 4 subjects
Ecology
1
Metallurgy
2
Oil / petroleum
5
Technology
1
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