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铁路車辆制动机合成閘瓦片的演变从1934年起摩托車組制动机上,除用鑄铁閘瓦外,已逐漸使用合成閘瓦片——鼓形制动和盘形制动。著名的快速摩托車組“汉堡飞行人”(1932年)已首先安装了外閘瓦的鼓形制动机。但是由于其吸收能量的增加、空气制动、基础制动及手制动的不完善、各鼓分配的制动力不均匀或者手制动沒有全緩解致使閘亙片輕微摩擦鼓面等,常使制动时閘瓦片
The evolution of the synthetic brake shoe for railway vehicle brakes Since 1934, motorcycle brake units have been gradually using synthetic brake tiles - drum brake and disc brake instead of cast iron brake shoes. The famous fast motorcycle group “Hamburg Flying Person” (1932) has first installed a drum brake outer brake shoe. However, due to the increase of the absorbed energy, the air brake, the basic brake and the hand brake are imperfect, the brake force distributed by each drum is not uniform or the hand brake is not fully relieved, which causes the brake rotor plate to slightly rub the drumhead, Brake brake shoe