?

?
???????70-80?????????????????????????????????????4-6??????????????????????????????????
?-?    
????1????,?78????????????2

??????2????????1?????2?46?????????????????????????????????????????3124?????????????????5??????????????1???????

?-     ??70-80???????...

?
6.57.5mm????3?????????????
?5.70?7?4?5.60?????????34??????????7??????????????????3?????1?????????1????????????????????????????????????1????????????????2?????????????
?????????????
?1.26?0.60??????????20?4080
?4.??
??23????????6??
?4?????????????6???2????????.?
?7???.???????????????????????2???
?1...

   ?????????????????????    ?
6.57.5mm????3????????????? ?5.70?7?4?5.60?????????34??????????7??????????????????3?????1?????????1???????????????????????????????1????????????????2?????????????
?~
?

?

????????

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

???????

?2002245?

???????????????????????????????????????????1980~2320??1390~1850?150???85.0%?83.5%??77.8%?75.1%?150~180?77?41????
??????????????????????????????????????????????????????????????????????????????????????????????
?????????????????????????????...

?????
     ??????,????????????, ?????, ??
     ?????
     ?????,????3???(?1)
     (?)? ?????????????????????????????????????????????????????
     ????????45, ????, ???????????????????????????????(1)?...