The main problem in design of gasoline fractionator is how to prevent blocking of gas phase polymer and coke pellets in packing and gas distributor.

汽油分馏塔设计中的主要难题是如何从工艺及结构上解决气相聚合物和焦化物对填料和气液分布器的堵塞问题。

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Nor does it reflect production costs for the Volt, which has expensive technology including lithium-polymer batteries, and sophisticated electronics, plus an electric motor as well as its gasoline engine, Reuters says.

FORBES: Stunner: GM May Be Losing $50,000 On Each Chevrolet Volt