Warning: file_put_contents(/www/wwwroot/ppbbbu/oiqp.com/cache/9790ad30f0bc0ab9519120113025b997.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/oiqp.com/index.php on line 55 buttress thread英英字典_buttress thread剑桥英语解释_buttress thread柯林斯英文解释_奇葩剧汉英词典
1. N a screw thread having one flank that is vertical while the other is inclined, and a flat top and bottom: used in machine tools and designed to withstand heavy thrust in one direction 偏梯形螺紋