它由甲醇或烃类气体在气相中靠催化氧化制取。
It is made by catalytic oxidation of either methanol or hydrocarbon gases in the vapor phase.
研制了用于制取肼类标准气体的动态配气装置。
A developed dynamic hydrazine vapor generator is introduced to gain the standard hydrazine vapor.
一些其他的气体，例如氩气，仅可以从空气中制取。
Some of the other gases, such as argon, can only be obtained from the air.
一些其他的气体，例如氩气，仅可以从空气中制取。
Some of the other gases, such as argon, can only be obtained from the air.
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