Hydrogen as a carrier gas is better than nitrogen.

氢气作为载气的效果优于氮气作为载气的效果。

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Apparatus - a gas chromatograph consists of a carrier gas source, an injection port, column, detector, and recording device.

仪器—一台气相色谱仪包括了载气源、进样口、色谱柱、检测器和记录设备。

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Gaseous helium is used as a coolant during the drawing of optical fibers, as a carrier gas for chromatography, and as a leak detection gas in a variety of industries.

气态氦在光学纤维拉制中用作冷却剂，在色谱仪中用作运载气体，在许多工业中用作检漏气体。

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They were thrown into the back of an armoured personnel carrier and that a soldier fired a canister of CS gas inside, he said.

BBC: Inquiry hears IRA guns were removed