helical rotor type pump是什么意思，helical rotor type pump的翻译，helical rotor type pump音标、读音、用法和例句_开心英文字典

Warning: file_put_contents(): Only 0 of 7181 bytes written, possibly out of free disk space in /www/wwwroot/ndsq.cn/index.php on line 55
helical rotor type pump是什么意思，helical rotor type pump的翻译，helical rotor type pump音标、读音、用法和例句_开心英文字典_柠咚词