测距
....\pro
....\pro.c
....\pro.hex
....\pro.lnp
....\pro.LST
....\pro.M51
....\pro.OBJ
....\pro.plg
....\pro.uvopt
....\pro.uvproj
....\pro.__i
....\pro_uvopt.bak
....\pro_uvproj.bak
....\STARTUP.A51
....\STARTUP.LST
....\STARTUP.OBJ
....\用51单片机实现HC-SR04超声波测距程序.doc