Product Description
The core barrel assembly lifts the drill core from the drill rod without picking up the drill bit. All tools include the main parts of drilling tools, overshots, drill pipes, jaws, round wrenches, etc. Their advantages are high http://www.china-zjtk.com/core....-barrels-and-oversho
退屈
この投稿は単調で繰り返しが多すぎるという理由で、多くのユーザーからフィードバックを受けています。