The cutting piece of the angle grinder is installed backwards and it is very dangerous to explode

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[@petergm7576]

去年让小区物业帮忙割一块塑料板。我站在近2米开外的地方看。切割机刚一开，我的脑袋就突然间感觉被什么东西狠狠砸了一下。后来看到前额被砸了4-5公分的口子。口子不是很深，感觉应该是上面螺帽敲的。如果是刀片，我想我的脑袋应该开花了。😮

[@user-py4np6oz6p]

護罩在那