double sliding back gear是什么意思，double sliding back gear的翻译，double sliding back gear音标、读音、用法和例句

Warning: file_put_contents(): Only 0 of 4803 bytes written, possibly out of free disk space in /www/wwwroot/ppbbu/cp667.com/index.php on line 55
double sliding back gear是什么意思，double sliding back gear的翻译，double sliding back gear音标、读音、用法和例句_淳朴汉英词典

double sliding back gear

基本解释

专业释义

經濟學