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

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10944

????????????????????????????????????????(cm),????綣????????????????????????????????б???????????磨in????????(cm)??????????????????????????????????????????????????????£????=1/2.54????,????λ??????λ???????????????????1???(in)=2.54????(cm)???????1????(cm)=0.3937008???(in)?????????????????????????????n??????????????n??????????????

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1???(in)=2.54????(cm)

?????λ????(m)

?????λ????

????????????AQ

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