????:1????????:????????

2?400?4???????

3???????????

4???????????

5???????????

??????6??11??????????????? (? ?)??11??,????????SL1000?????,?????

??????????,????????????????????“??”,??????????????????

?????????????,??(?)??????????????,???????????????????840???????,????100+???

??????,?????????????????????????????????,??????,?????????????

??????????????????????????:“????SL400???100mK(-273.05?)?400??????????????????????,????????????????????SL1000??1000????????????,??????1.5??3?????????????????”

????,??SL1000???????????,????,??“????????????????”???????????????“?????????????”?(?????????????????????????) ?????:?????????????????