| 单词 | methane indicator | 
| 释义 | methane indicator [`meth´ān ´in·dǝ´kād·ǝr]  MINING ENGINEERING A portable analytical instrument that can determine the methane content in the mine air at the place where the sample is taken; air is brought into the instrument through an aspirator bulb and passed through a cartridge filter to remove moisture.  | 
	
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