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????:1????????:?????????????
2???????????
3???????
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??????6???????????????16???????????? (?????????????????????? ???????)?????16?,?????,??????????????????????????6mK(??-273.144?),?????
????????????????????????????????,?????????????????,?????????????????????????????,??????????????“????????????????”(??????????273.15?)???????????????????,?????????????????????,?????????
??????????,??????????????????????????,??????????????1mK,??????????????????????6mK-200mK????????????,??,????,???????????????????????20mK???????,????,?????,???????????????????,????????????????????????
????????????????,??????????????????????,?????????????,????????????????????(??) ??????????????:?????