简述托板螺母的安装步骤。
1、零件加紧;2、确定空位;3、制孔;4、铆接托板;5、制窝;6、倒角倒圆;7、备件;8、安装;9、涂漆。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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