| 1. | Fire stopping collar of pvc - u pipe for building drainage
硬聚氯乙烯建筑排水管道阻火圈 |
| 2. | Centralizer placement and stop collar testing
扶正器放置和限动环检验 |
| 3. | Locking collar with gear outside stopping collar with tongue outside
外舌止动垫圈内舌止动垫圈 |
| 4. | Stopping collar with tongue outside
外舌止动垫圈 |
| 5. | Stopping collar with tongue inside
内舌止动垫圈 |
| 6. | Stopping collar of round nut
圆螺母止动垫圈 |
| 7. | One - eared stopping collar
双耳止动垫圈 |
