Your major products are gasapparatus. They're mostly marketed at home and some of them are exported to the Southeast Asian countries.
你们的主要产品是煤气用具，大多数是在国内销售，有一些出口到东南亚国家。
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Those made by his firm use advanced laser-fluorescence technology: more accurate, simpler, cheaper and more robust, he says, than the gas-chromatography apparatus in common use so far.