使用推针，从钻孔上取出止推环。
Drilled knock-out holes for driving out thrust rings, using pins.
弧形止推环吸收内部压力施加的全部推力。
Segmental thrust ring absorbs all the thrust applied by internal pressure.
分段止推环吸收了所有由内部压力产生的推力。
Segmental thrust ring absorbs all the thrusts applied by internal pressure.
阐述了自压密封旋启式止回阀的结构特点、工作原理、材料选用和止推环设计。
Describe the structure characteristic and working principle of pressure seal swing check valve. Material selection and thrust ring design.
无论是对于垫层方案或是保压方案，是否设置伸缩节和止推环对蜗壳应力状态影响均较小。
For MSCL and MHWH, the setting up of expansion joint and anti-thrust ring will not much affect the stress distributions of SC and surrounding concrete.
无论是对于垫层方案或是保压方案，是否设置伸缩节和止推环对蜗壳应力状态影响均较小。
For MSCL and MHWH, the setting up of expansion joint and anti-thrust ring will not much affect the stress distributions of SC and surrounding concrete.
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