File list (Check if you may need any files):
蜂鸣器\buzzer01\buzzer01
......\........\buzzer01.hex
......\........\buzzer01.lnp
......\........\buzzer01.M51
......\........\buzzer01.Opt
......\........\buzzer01.plg
......\........\buzzer01.Uv2
......\........\buzzer01_Uv2.Bak
......\........\main.c
......\........\main.LST
......\........\main.OBJ
......\.......2\buzzer02
......\........\buzzer02.hex
......\........\buzzer02.lnp
......\........\buzzer02.M51
......\........\buzzer02.Opt
......\........\buzzer02.plg
......\........\buzzer02.Uv2
......\........\main.c
......\........\main.LST
......\........\main.OBJ
......\.......3\buzzer01
......\........\buzzer01.hex
......\........\buzzer01.lnp
......\........\buzzer01.M51
......\........\buzzer01.plg
......\........\buzzer03.Opt
......\........\buzzer03.plg
......\........\buzzer03.Uv2
......\........\buzzer03_Opt.Bak
......\........\main.c
......\........\main.LST
......\........\main.OBJ
......\buzzer01
......\buzzer02
......\buzzer03
蜂鸣器