... 六氟化硫标准气体（sulphur hexafluoride calibration gases） 甲烷标准气体（standard gas of methane in air） 空气中甲烷标准气体（standard gas of methane in air） ...
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空气中甲烷标准气体 standard gas of methane in air
氮中甲烷气体标准物质 Methane in Nitrogen ; CH4 gas in Nitrogen Reference Material
氩中甲烷气体标准物质 Methane in Argon ; Methane gas in argon Reference Matherials
本文介绍了温室监测用空气中甲烷标准气体的性能。
This paper describes the performance of standard gas of Methane in Air for greenhouse measurement.
氮中二氧化碳和空气中甲烷气体标准物质属于标准混合气。
The two gaseous Reference Materials, Carbon dioxide in nitrogen and methane in air, belong to standard mixed gases.
2015年8月，美国针对垃圾填埋和油气行业的甲烷气体排放草拟了专门的标准，并承诺将于2016年制定完成上述标准。
In August 2015, the United States proposed separate standards for methane emissions from landfills and the oil and gas sector, and commits to finalize both standards in 2016.
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