| 1. | Another prevention method was through elaborate locking rings which made meters non-removable, except with special keys .
另一个预防措施就是安装精制的锁环，使仪表非得用特备的钥匙才能移动。 |
| 2. | Lock rings at the end of shaft with screw
螺钉紧固轴端挡圈 |
| 3. | Lock rings at the end of shaft with bolt
螺栓紧固轴端挡圈 |
| 4. | Lock rings with screw and circlip
带锁圈的螺钉锁紧挡圈 |
| 5. | . pn 6 plastics - half symmetric fitting guillemin system with locking ring . nominal pressure pn 6
带锁紧环的半对称配件 |
| 6. | Lock rings with cone pin
锥销锁紧挡圈 |
| 7. | Fold appearance skimmers zinc and chromium plating steel locking ring structure line
褶皱外观，镀铬钢闭锁环和压模锌线结构 |
| 8. | Tool for pressing - gliding pillars - pillars with centre locking and locking ring
冲压工具.滑动导柱.中间锁定导柱和锁定环 |
| 9. | Lock ring with screw
螺钉锁紧挡圈 |
| 10. | Lock ring copper sheet
紧箍铜皮 |
