?? ??????????????????
????:1??????????:??????
2?????????
3????????
4??????
5?????????????
??????????????11??????23????????????(?? ????)11?????23????,“??????????”????????,???????????
??????? ??????,????,??????????????????????????????????????????????????????????????????????????????????????????????????????????????30????80???????????????,????,???
?,??????????????????????????;???,?????????????????«GB/T23776????????????????»?????????????????,?????????????5?????5?????????????
??????????? ??????????????,???????,???????,????(????)??????,????????????????????,?????????????
????????,???????????????????????,????,???????????????????????,????????????????????????????????????
??,??????????“???????????????”???,??????????,?????????,????«??????»«???????????»«??»????????????
?????????????????????? ??“????????????????????????,?????????????????????”???,??????,????????????????????????,?????????????????,??????;????????????,????,?????
????,?????????,?????“??”??,?????????????,“????????????????”???????????“?????????”???????39.2????,??????????120??,??????????2????,90%????????,75%????????“???”?54.76??????,????????????(??????)
?????:???????