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          ?????????2011-10-13 10:25 ?????????

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          ??????????????????????????????????????????????????Щ???????????????????????к????????????Щ?????????????????????????Щ???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????
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                                  ???            ?????? ≥40%    ??????≥7     ?????≤0.004
                                  ????            ?????? ≥35%    ??????≥5     ?????≤0.005
                                  ????            ?????? ≥30%    ??????≥3     ?????≤0.006
                                  ???            ?????? ≥25%    ??????≥2     ?????≤0.006
                                  ?弶            ?????? ≥20%    ?????? ????   ?????  ????
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                                  ???             ???  ???  ????  ????  ???  ?弶  ????
                              ??MnO2≥%       80     75     70      65      60     55     50
                                                   ???????????????
                                            ???    ???   ????   ????   ???
                                         ????≥%    24      22      20      18
                                         ????≤%    2.5     3.0     3.5     4.0

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