Through observation on shock wave and multiple pulsating caused by underwater blasting, the velocity, period, frequency and energy of shock wave and multiple pulsating are analysed.
In the construction period of some flat earthwork deep hole blasting, the price of blasting materials was rising, so how to save the cost was the main problem faced the project.
某场平土石方深孔爆破施工期间，恰逢爆破器材价格上涨，如何节约爆破成本是此工程面临的主要问题。
3
During the blossoming period, hot dry weather caused poor pollination and fertilization and consequently resulted in fruits blasting.