On that basis, the vertical lapse stack source, energy concentrated bullet and explosive seismic hammer source have been developed.
在此基础上，研制了垂直延迟叠加震源、聚能弹震源和爆炸地震锤震源。
2
The commonly used alloy hammer of vertical impact crusher has poor quality, short life and large consumption, affecting the equipment availability.
常用立式冲击破碎机合金锤头质量差，使用寿命短，消耗量大，影响了设备的运转作业率。
3
The perfect hammer head can be obtained by designing technological equipment, using vertical pouring and string casting process in CO2-sodium silicate sand.