?? “????”??? ??????????????:????
![](https://image.chezhanri.com/2019/0628/20190628112153876.jpg)
????:1???????????:??????
2?????
3?????????
4??????
5????????
??????????????:????????????,??,?????????????????????????????????LED???,??????????“????????”?????????,“?”?????????????????????26??,“???”????,???
???????????????,??33????,????????????5???????????,???????????,??????????????,?????????????????,?????????,????,?????????7?25?????????????,???????????????????,?????????????????????,?????????????????????????,??????,??????????“??”??,?,?????????????“????????????????????????????????????”?????????????????,??,???
???????????????:??????