高精度步距规在检验数控机床时的突出优势

介绍高精度步距规的特点及其检验数控机床的优势,提出相关建议。     

Introducing a novel system to gauge energy intensity

At present, China uses energy consumption per unit of gross domestic product （GDP） as a .major statistical index for energy efficiencymeasurement. Although it reflects the level of energy consumption of an economy to a certain extent, this approach has grave defects when drawing static or dynamic comparisons, both in this country and abroad. However, there is currently no generally accepted way of evaluation in this regard.