Warning: file_put_contents(/www/wwwroot/zidian/biehu.cn/cache/08ee9dadb34889b6fb70d623fc89c775.txt): failed to open stream: No space left on device in /www/wwwroot/zidian/biehu.cn/index.php on line 58 spur wheel英英字典_spur wheel剑桥英语解释_spur wheel柯林斯英文解释_甲百匯小鸡词典
1. N a gear having involuted teeth either straight or helically cut on a cylindrical surface. Two such gears are used to transmit power between parallel shafts 正齒輪