Warning: file_put_contents(/www/wwwroot/ppbbu/bieo.cn/cache/d7a6475301195416a8ad251cb599f09d.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/bieo.cn/index.php on line 58 bit feeding mechanism是什么意思，bit feeding mechanism的翻译，bit feeding mechanism音标、读音、用法和例句_衣物護欧路词典
Start collaring with reduced throttle to the impact mechanism and feeding, let the bit work its way slightly into the rock. 開孔時，應採用最小的沖擊和推進力，使鑽頭平穩地進入巖層。