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??? ????,??,???,??????????????????,30~~60,??????,??,???????,?? ?? ??,?,???4cm??60cm,20kg???>=10cm??? ? ??????????????,????,???????,?? ????? ???????? (1)????????????,???,????,????,???????????? (2)??,???,?????? (3)???,?????,??? (4)???,???,??? ??? ????,????? ??? ????,????? (1) ?????,???? (2) ??,???,,?? (3) ????,?,??? (4) ????,???? (5) ??,?? ???? ??????????????1863Virchow??,?? 0.4%~7.4%,?,30~45?????1:0.6~10?151?,??47.20%,?36.4%,?11.2%,???5.2%66.4%~90%,?10%~33.6% ?????? ???,?????,????????????,??,?...
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