?? ????????1:2,?????????
![](https://image.chezhanri.com/2019/0618/20190618111001628.jpg)
????:1????????:??????
2???????
3????????100??
4???????kmsn
5???????95
“?????????????????????????(????????????????)??(????)???????2.5?????????????,?????????????(??)???1:2?”
?,??????????,????«??»TB 10100-2018????????????,??????????????????????????????,?????????????«????»?????(??????????)??????????,??????????1:2?
???,?????,????????????????????????????????,“????????????????????”??????,??“????????????????????”??????????????????????
???,???????«???????????????????»,???????????????,??“???????”??,???????????????
????,?????????????????????,???????????????????????,?????????????
??????,«????»????????????????????????????????“??????????????”,???????????????????????,??????????
???,???????????,????????,???
?????????????,??,????????,????????,??????
(??????????????????? ????????????????) ???????????????????????:?????