Warning: file_put_contents(/www/wwwroot/ppbbbu/n94.cn/cache/f342cac88440d33aa16e040d4721ae88.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/n94.cn/index.php on line 55 wheel and axle英英字典_wheel and axle剑桥英语解释_wheel and axle柯林斯英文解释_94生活常识网有道词典
1. N a simple machine for raising weights in which a rope unwinding from a wheel is wound onto a cylindrical drum or shaft coaxial with or joined to the wheel to provide mechanical advantage 輪軸