和其他国外的工程机械产品相比，国产液压挖掘机缺少竞争力，在国内的市场占有率也是相对较低。

Compared with other foreign engineering machine, domestic hydraulic excavator is lack of competitiveness and has the lower share in domestic market.

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而国产液压挖掘机由于技术落后，与国外一些知名企业生产的液压挖掘机相比，效率较低，能源浪费现象较严重。

Efficiency of domestic hydraulic excavator cannot compare with those have been produced by some known foreign enterprises because of unadvanced technique, so they waste more energy.

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现在，国产大中型液压挖掘机一般采用柴油机驱动变量泵进行工作。

Now, the domestic large-and-middle-scale hydraulic excavator generally adopts the diesel engine to urge the variable pump to carry on the work.

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