Qinyan brand brake block. Other brands are ok if it is wear resistant.
最好是秦燕牌的刹车片，其它品牌的必须要求耐磨。
2
The wear resistant corundum ceramic block includes integral main body, protuberant part, limiting part and connecting holes, and the limiting part has shape corresponding to the protuberant part.
In this paper, 9 compressive specimens of 3 groups were tested to investigate the cracking resistant load, ultimate load, failure modes and deformation capacity of the grouted slotted block masonry.