1????ú?????
????ú??30%??ˉ??30%?????30%?????8-10 %???????0.2%????100kg/cm2??8%??? 150kg/cm2??10%???
????2????????
???????60%?????3%?????8-10%???????3%?????0.2%??
????3????????
????????60%?????30%?????10-15%???????0.5% ??
??????????0.2%???????0.2% ???????0.2% ???????????
????4???????????????
???????90%?????8-10%????? 0.2%???????0.2% ??
????5??????????
???????????60%?????30%?????10-15%????? ??0.2%???????0.2%???????0.2% ??
????6?????????ú?????
??ú??60%??ˉ??30%?????8-10%???????0.2%???????0.2% ??
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