Their handshake appeared to be a gesture of reconciliation.他们的握手似乎是和解的表示。The quick handshake was firm and cool.短暂的握手有力沉稳。John smiled and gave him a hearty handshake.约翰微笑着和他热情地握手。...
A method for determining the hexagonal polytypes of silicon carbide using the Laue pattern is described.本文提出了用X射线 劳埃法鉴定SiC六方多型体类型的方法.For the materials with high hardness, such as cemented carbide, glass , jadeware, etc.适...