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27

3. ! " # . *# , $ $ ## . ? 1…3,5 'C / - > 100…500 'C / < - . " & #- -# # 4 > @ 1 /< 0,01 / > . $ & $ " $# > # .

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* # " % "# '? 50 J< $ - : < &$% # -& &$% . ! # # #-" % (" % # ># ) # > " " "-( $ # & #$)-& # " $. P % # >#$ : " " , $@- , $@ , > , ; , # " % # < , < ( ), . " % # ># # >># & .

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&$% ..........................	30 C ;
&$% ...............................	500 C .

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30