Warning: file_put_contents(/www/wwwroot/ppbbu/80125.cn/cache/c55de393ab202068d7f5cda0d4d72f72.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/80125.cn/index.php on line 58 backing vacuum pump例句_backing vacuum pump英汉例句_backing vacuum pump双解例句_食材鋪反向词典
This Model Vacuum Pump can be used along, or as the backing pump of the other kinds of pumps, such as booster pump, diffusion pump, molecular pump etc. 它可以單獨使用， 琯道泵也可作爲增壓泵、擴散泵、分子泵的前級泵使用。