| 申请日期 | 2025-06-27 | 申请号 | GB0620054 |
| 公开（公告）号 | GB2427619A | 公开（公告）日 | 2007-01-03 |
| 公开国别 | GB | 申请人省市代码 | 全国 |
| 申请人 | SMITH INTERNATIONAL | ||
| 简介 | A drill leg 17 for an earth boring drill bit (10, fig 1) comprises a journal pin 18 having a coating thereon. The coating material is chosen such that the amount of carbon diffusing from the journal pin during a subsequent heat treatment process is restricted. | ||
|
您还没有登录，请登录后查看下载地址
|
客服热线：
手机版
二维码
