| 摘要 |
From the original chipping bit which is a solid metal, a piece of carbide will be placed on tip of it as disclosed, which will be welded by copper and/or the likes by placing a piece/s of carbide using cupper weld on tip of it to protect the bit itself from blunting. It can be use efficiently in chipping concrete, concrete opening, demolition of concrete walls, flooring, hallow blocks and the likes. |
