Warning: file_put_contents(/www/wwwroot/ppbbu/bieo.cn/cache/90a2fe4b175a97de01df98af9c60eedb.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/bieo.cn/index.php on line 58 butten例句_butten英汉例句_butten双解例句_衣物护欧路词典
This paper describes the top structute of Mode C down-the-hole butten bit, including the top shape, fragments blowdown space, butten shape and but-ton distribution, etc. 文中对C型潜孔柱齿钻头头部的端面形状、排渣空间、柱齿形状及分布等问题加以阐述。