正方孔相关论文
<正>Some experiments were made for the buoyant jet from a square orifice with a square disc placed on it in static ambie......
介绍了正方孔组排间微差起爆的原理及组排间延期时间的确定方法,提出了改变原爆破中的连线方式,采用正方孔组排间微差起爆,既提高......
