Warning: file_put_contents(/www/wwwroot/ppbbu/4cd.cn/cache/43b5fcd851d8eacb92a1ab4f6aae373e.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/4cd.cn/index.php on line 55 bit feeding mechanism例句_bit feeding mechanism英汉例句_bit feeding mechanism双解例句_沉淀汉英词典
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。