The compressor is balanced so that, in most cases, the compressor can be run on a high-density rubber pad, and does not require a special foundation.

压缩机经平衡设计，振动小，不需要特别的基础，在某些场合，甚至可以在高密度橡胶衬垫上运行。

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Because of the extensive mode of land use in a long run, the density and capacity of reconstruction has become too high, while the residents 'living standard has not been essentially improved.

由于城市土地长期粗放开发利用，旧城改造建设容积率过高，建筑密度过大，而人们的居住生活水平并未得到根本性的提高。

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The first trial run demonstrated that 1 km of high-density polyethylene pipe could be laid down over mountainous terrain and in windy conditions in just nine minutes.

FORBES: Startup Aims To Install Pipelines With Helicopters...Seriously!