通过对汽油提升管内催化剂流动形式的分析，提升管内气固接触形式为密相气力输送。
In addition, flow pattern of catalyst in gasoline riser has been studied and the result shows that gas solid contact in the riser was in the form of dense phase force transfer.
为满足即将实施密耦催化剂的国家第3阶段排放标准，汽油车排气冷起动问题显得尤为重要。
It is very important to deal with HC emissions during cold-start phase of gasoline vehicles, especially to meet requirements of EURO 3 phase emission regulation.
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