止块 meaning in Chinese

dog segment

And the paper analyzed the relations between the errors of the components and load distribution among the backstop piece , and put forward a method of translating the errors into a equivalent error . for the occasion of several backstops being used at the same time , the paper put forward a project of uniform load among the backstops
分析了误差对逆止器内部逆止块的载荷分布的影响，并提出各种误差转化为等效误差的方法；对多个逆止器同时使用的场合，提出了均载方案。