Distributive characters of hypervelocity fragments impacting double - level target were researched.研究了超高速破片碰撞 双层 靶形成碎片云的分布特点.The meteorites struck the earth with hypervelocity impacts.流星以超高速撞击力冲击地球.Studies the hyperveloc...
The street is quite steeply cambered at this point.这条街的这个地方拱起很高.Cambered surface loading, high precision and high reliability. Easy installation and changing.弧面承载方式 、 高精度和高可靠性,稳定性好. 安装方便,互换性好....