换岗时有十息空档

        西墙——一个巡逻

        来回走

        步伐散漫

        走到墙根时会停一下

        点根烟

        靠着墙抽两口再走

        抽烟那十息

        背对墙面

        什么都看不见

        正门——四个明哨

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