The safety clamp prevents the tool string from being dropped downhole accidentally if the slips or elevators securing the string lose their grip.
如果卡紧管柱的卡瓦或吊卡失去了其抓力，则安全卡瓦可防止工具管柱意外地掉落井下。
The slips in the packer is for supporting packer and for locking rubber after anchoring. The capability of the slips influences directly on oil well yield and productive safety.
封隔器上的卡瓦锚定后起到支撑封隔器、锁定胶皮筒的作用，其性能好坏直接影响到油井的产量和生产安全。
You can find more powerful weapon and some useful items like bombs and safety shields, or better chassis if the your one slips on the ice or does not allow to cross the acid.
您可以找到更多的有力武器和一些有用的项目，例如炸弹和安全盾牌，或更好的底盘，如果您的一纸关于冰或不容许跨酸。
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