| 1. | Reduced hexagon bolts , short thread tolerance p6
光杆公差带p6 .短螺纹小六角头螺栓 |
| 2. | Servo - aligning sealer for polished rod at wellhead
抽油井口随动对中光杆密封器 |
| 3. | 90 countersunk head bolts with recess , tolerance p6
光杆公差带p6一字槽. 90沉头螺栓 |
| 4. | Field application of qbzc - 25 28 polish rod sealer
28光杆密封器的现场应用效果评价 |
| 5. | 90 countersunk bolts , short thread , shank tolerance h8
光杆公差带h8短螺纹90沉头螺栓 |
| 6. | Design of the polished rod dropout braking system
抽油机光杆断脱抱死系统设计 |
| 7. | Development and application of polish rod vibration absorber
光杆减震器的研制与应用 |
| 8. | Hexagen bolts , short thread , shank tolerance f9
光杆公差带f9短螺纹六角头螺栓 |
| 9. | Function words in textual research on
光杆动词句中动词对主语的语义选择限制 |
| 10. | Effects of polished rod clamps on polished rod fatigue life
光杆卡对光杆疲劳寿命的影响 |
