?? ???? ????????????????1.5?
????:1?????????:??????????
2?????????
3???????
4?????200?
5????????????
6??21????22??????,?,??24??????????399.1mm,???????6???12???24??????????????????????????????????????,?,??
?,???????1.5??????,?????????????4458??,??21???????????
(??? ????? ??????????????? ??? ??) ????:??????