过去许多研究都测量过出自尾气管的二氧化碳的水平。
Many previous studies have measured carbon dioxide levels that come out of exhaust pipes.
在对汽车尾气系统进行建模时，把尾气系统分为尾气管段和催化转化器两部分。
When the automobile exhaust system is modeled, the exhaust system is divided into two parts-the exhaust pipe and the catalytic converter.
该产品主要用于医用针头钟表配件汽车尾气管及其它一些不锈钢非金属材料的切割。
These products are used for cutting of hypodermic needles, watch parts, exhaust convertor tubing and other stainless steel or some nonferrous material.
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