bumper sub
短语词组
- bumper r sub 震击器
- Lubricated fishing bumper sub 闭式下击器
- long strke bumper sub 长冲程震击器
- sealed bumper sub 油封式震击器
- fishing bumper sub 打捞伸缩节;打捞缓冲器
- drill string bumper sub 钻柱减震器
- surface bumper sub 地面震击器
- oil -sealed bumper sub 油封式震击器
- pressure balanced drilling bumper sub 压力平衡式钻井震击器 返回 bumper sub