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          ?????????2015-09-27 10:51 ?????????

          ?????? ?????λ??????????????????????????1949 ??????????????????У?????????????120??????????????????????......

          A  ???
              ?????λ??????????????????????????1949 ??????????????????У?????????????120????????????????????????A???????????47%????????????0. 2%??
              ????????????????????????????????ε?????????????????????л??????????????????????????????????????????????????????????????????????????????????????????????????????????3??????????l??????????????????5?????
          B  ???????
              ????????????????????????—????????????????????????б??????????????????????????????????????????????????????????????????????????????????λ18.3%  - 26. 0%?????????? 28. 2%  - 36.7%????????????3.4% -3.8%????0.145% -0.212%.
          C  ????????
              ?????????????????????????????鵽-60 mm???ò?????????????????????????????鵽—25 mm???????25 - 10mm,10 - 2rnm??—2????????????25 -10 mm??10 -2 mm??????????????????????t????β??-2 mm?????????????????e??????????????????????????????????д????????β??

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