Objective: to establish the contents determination method of (-) -menthone, menthol, cinnamic aldehyde in Po Sum on oil by capillary column gas chromatography.

目的：采用高效毛细管气相色谱法同时测定保心安油中(-)-薄荷酮、薄荷脑和桂皮醛的含量。

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Refer to the way for convey of fuel gas with liquid condensate according to ASTM and ISO standard, some idea for convey of town coal gas with Po...

按astm及ISO所述的带有冷凝液的燃气处理方法，提出关于用聚乙烯管输送城市煤气的一些看法。

youdao

Still, he violated his instructions and drilled for oil--and found huge natural gas reserves in Italy's Po Valley.

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