ī???????????
              
                ????
                ????ī?????????????????1919??
              ????
                ????????????5?? 5000???/??
                ?????????????5?? 5000???/??
                ?????????5?? 4000???/??
                ??????磨4?? 3500???/??
                ????????????6?? 4500???/??
                ?????????????4?? 3500???/??
                ???????????????1?? 3500???
              ?????
                ?????γ???????????????????????????????????????????????????????????????
                ???????????????????λ??2~2.5????
                ?????о???????????о?????
                ??????????????????????????????????????????????????????
                ???????????????????ζ????