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词汇
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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更新时间:2025/11/8 0:14:13