Warning: file_put_contents(/www/wwwroot/ppbbu/73904.com/cache/7731820821f6909e7170af0d4e5514f6.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/73904.com/index.php on line 55 press mark例句_press mark英汉例句_press mark双解例句_骑士汉英词典
Crack nucleation and propagation in wear-resistant bainite ductile cast iron were investigated by press trace method and SEM. 採用壓痕法及掃描電鏡觀察，研究了抗磨貝氏躰球鉄中裂紋的形核與擴展。