英语词汇“gas reference materials”的翻译、意思、用法、释义-英汉汉英双解词典

单词	gas reference materials
释义	gas reference materials 基本例句气体标准物质 The two gaseous Reference Materials, Carbon dioxide in nitrogen and methane in air, belong to standard mixed gases.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。
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