叙述了对红透山铜矿一竖井由于多次延伸，多次更换提升容器，导致安全间隙不足而进行的技术改造。
A shaft of Hongtoushan was deepened for many times and the lift container was changed for many times, thus, the safe space was not big enough.
安全刷-善意且有效地提醒客户留意扶梯阶梯和裙侧板之间的间隙。
Escalator safety brushes - a gentle, yet effective reminder to escalator passengers to mind the gap between the step and the balustrade.
当制动盘磨损到影响安全操作或制动间隙无法调节时，即为失效。
When brake disc wears enough to affect safety in operation or can 't adjust clearance, this is called failure.
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