其数值均按相应质量比混合法调制，使用经过检定机构检定的标准气体。
All JCSS gases are assigned their values using gravimetric standard gases analyzed by the government agency.
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.
我社对应更高精度的标准气体需求，可提供应用大质量超精密天平取得的质量比混合法标准气体。
Takachiho gravimetically produces standard gases for applications requiring the most demanding precision using the ultra-precise giant gravimetric balance.
分析了重量法制备氮中多元标准混合气体定值不确定度的来源，其定值的扩展不确定度小于3％。
The source of the certification uncertainty of multi-component calibration gases in nitrogen was analyzed. The uncertainty is less than 3%.
分析了重量法制备氮中多元标准混合气体定值不确定度的来源，其定值的扩展不确定度小于3％。
The source of the certification uncertainty of multi-component calibration gases in nitrogen was analyzed. The uncertainty is less than 3%.
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