The protection from water lock should avoid using water-based fluid as can as and the fluid would reverse in time to reduce the invalidation of the water-based fluid ;

储层水相圈闭和水锁损害强，应尽量避免和减少水基工作液侵入，侵入的水基工作液要能及时有效反排。

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Chris Hall, of the Rail Accident Investigation Board, said that Mr Lund would have had "no reason to believe" the train would change direction, which was most likely caused by the driver forgetting to lock the reverse lever.

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It becomes very hard to reverse this process and lock the metals up again, although it can be done.

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The new standard of practice is to lock down the camera and move the action around it, instead of the reverse, which is the case in today's 2D movies.

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