简单非平衡式的两制动蹄的支承点和张开力作用点的布置都是轴对称式。制动时,两个制动蹄对制动鼓的制动力矩()。
A. 相等
B. 不相等
C. 前进时相等后退时不相等
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无源应答器把前方一定距离内的线路参数向车载设备传输。前方一定距离是指从前方第二个应答器组向前到大约制动距离处
A. 正确
B. 错误
When a business suffers a security breach, there are be serious ramifications. What is one of the immediate impacts that the business can suffer because of a security breach?()
A. loss of retail sales
B. loss of customer faith
C. disruption of business operations
D. inability to deliver products or service
SWRH82B属于()。
A. 低碳钢
B. 中碳钢
C. 高碳钢