The content of acetylene and other hydrocarbon in liquid oxygen measured by gas chromatogram has gas chromatogram concentrate method and direct method.
利用气相色谱浓缩法和气相色谱直接法测定液氧中乙炔及其他碳氢化合物含量。
It also supplies liquid oxygen, liquid nitrogen, acetylene, carbon dioxide, hydrogen, propane, freon, liquid ammonia, and rare element gas.
还兼营液氧、液氮、液氩、乙炔气、二氧化碳、氢气、丙烷气、氟里昂、液氨及其他高纯和稀有气体。
Yedan, oxygen, nitrogen, acetylene gas, acetylene sales;
液氮、氧气、氮气、氩气、乙炔的销售；
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