Warning: file_put_contents(/www/wwwroot/ppbbu/62383.com/cache/b5e206fcc0ec435d2f05b9b275751b47.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/62383.com/index.php on line 55 internal friction factor是什么意思，internal friction factor的翻译，internal friction factor音标、读音、用法和例句_流逝汉英词典