Its iron ball consists of iron shell, drug-charginghole, drug-permeating pores and Chinese prepared medicine.
其铁球又是由铁壳、装药孔、渗药孔、中成药组成。
2
With the ceaseless injection of oil and the migration passage prolonging, the result is that migration force increases and oil comes into little hole near charging point.
随着油的不断注入，油相通道的延长，导致运移驱动力增加，这相应导致油进入近注入点的较小的孔隙。
3
By improving parameters of the blasting hole, the charge, charging structure and the priming order etc, the smooth blasting is formed.