The impact energy is the most important performance parameter of rockdrills.
冲击能是凿岩机最重要的性能指标。
2
Hand-held portable power tools. Measurement of vibrations at the handle. Part 3 : rockdrills and rotary hammers.
便携式手提电动工具。手柄振动的测量。第3部分：岩石钻头和旋转锤。
3
Main scope of business:Chinese chestnuts, silkworm cocoon, grain, traditional Chinese medicine, wild vegetables, stone products, fittings of rockdrills etc.