例句與造句

1. A new type of metal seal structure with double stub shaft moving disk butterfly valve was presented . the structure , characteristic and work principle of it was studied
   摘要提出了一種金屬硬密封蝶閥新結(jié)構(gòu)雙閥桿蝶板移動(dòng)式金屬硬密封蝶閥，討論了此閥的結(jié)構(gòu)、工作原理及特點(diǎn)。
2. It's difficult to find stub shaft in a sentence. 用stub shaft造句挺難的