????:1????????:???????

2????????

3???2020??

4????????????

5?????????

?????9????????????????????????????27???????? (? ??) ??????????75?????,??????????????????????????,????????????????????????????10????,?????????????????

??????????260???????????????,??,????????,???????????1.6???????,????

????,?????????,????????????5??????????80????????????????????,????,??????????????????????????????????????????60????????????????????????????18???????2??????,?????

9???????29??????10??7???,???????2850??,????????24:00????????????,???????????????????????,????75??????

????????????? ???????????

???????????????????,????????,?????????????????????????,???????????,????????,????????????“????”??????????????????

???66%,?????78%,???????LED?????????????,??121????859?????????PETG,??,??LED???,???????(??????)

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