例句與造句

1. Abstract : this paper has introduced the forming technology , mouldstructure , and working principle of composite die for three bulges plate
   文摘:介紹了三凸片成形工藝及沖壓模具的結(jié)構(gòu)、工作原理。
2. It's difficult to find composite dies in a sentence. 用composite dies造句挺難的