A wide variety of options is available like sleeve lock, one-way and straight-thru designs, release clamp with chain, etc.
选择范围广，如套筒锁、单向关断、直通式及带链条的释放夹等。
This paper also provided the experience in preventing the goaf water by adapting water detection and water release concentratedly, and by using sleeve to control water release.
采取掘进中集中探放水、利用套管控制放水量的方法有效消除了积水威胁，为防治老空积水提供了经验。
This paper also provided the experience in preventing the goaf water by adapting water detection and water release concentratedly, and by using sleeve to control water release.
采取掘进中集中探放水、利用套管控制放水量的方法有效消除了积水威胁，为防治老空积水提供了经验。
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