For use as a transportation fuel, liquefaction is limited by practical difficulties and compression requires high pressure and an expensive multi-stagecompression facility.
对于车用而言，液化方法实用性有限而压缩天然气需要高压及昂贵的多级压缩设施。
2
The utility model relates to a multi-stage adjustable scroll compression device, which drives a pair of or more than a pair of scroll dishes to carry out compression operating through a crankshaft.