Study area, secondary porosity is more developed in the research, including molded holes, intergranular dissolution pores and intergranular dissolution pores;
研究区次生溶蚀孔隙在研较为发育，包括各种铸模孔、间溶孔和粒间溶孔；
In this paper, the principle of blasting design, the calculation of charge mass, the arrangement of pre-molded holes, priming circuit and safety precautions are introduced.
本文介绍了爆破设计的原则、药量计算、炮孔布置、起爆网路和安全措施。
The utility model has the advantages that the utility model can press foaming polyurethane soles, and a plurality of circular holes in shoes can be molded.
本实用新型的优点是，可以压制发泡聚胺酯鞋底，并可使鞋内面若干个圆孔成型。
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