The old isotope gauge has a lot of shortcoming, such as the unadvanced equipment, the imperfect monitoring system, the fussy calibration method and so on.
原有同位素测厚仪存在着设备落后，监测系统功能不完善，测量精度不高，以及标定方法繁琐等不足。
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.
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.
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。
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