Warning: file_put_contents(/www/wwwroot/zidian/diubi.cn/cache/a6afbd5bc408169a9178e291f30a5a5f.txt): failed to open stream: No space left on device in /www/wwwroot/zidian/diubi.cn/index.php on line 59 steam jet pump例句_steam jet pump英汉例句_steam jet pump双解例句_果味酸柯林斯词典
A kind of multistage steam-water jet vacuum pump applied to the chemical, pharmaceutical and grease industries is described. 叙述一种多级汽水组合射流真空泵的开发与研究和在石油化工、制药、油脂等行业中的应用。