??????????????
????????
?????????????????????磬????????????????????????????????????????????????????????????λ????? m ????????? cm ????????? mm ??????????????У????????磨?壩???????????????????????λ??
????????????
??????????????
4??1500??8000 90??
4??1800??8000 32??
5??1800??8000 21??
5??1800??8000 90??
6??1800??8000 35??
??????4??6??????????14*1500*6000??q620qe????????????
