初步调查显示，超载导致了电梯制动器系统失灵。
The initial investigation indicates that the overloading led to the failure of the brake system of the elevator.
对制动器系统提出设计要求，制定基本的设计准则。
Made out the design requirements of brake system, develop the basic design criteria.
这些盘式制动器系统通常是最轻的，也是最昂贵的。
These disc brake system are usually the lightest and also the most expensive.
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