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????????????,??????????20?~25?,???1????,?????????????,????,?????????
2.??????,???????????????
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3.??????
???,?????0.04~0.06mm?????,???????????
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1.????,???????300?????????????
??,????????????20??????,???????60??,??????1200???
??????????,????????0.36??????/100?????????,?????,???,?????????????60??????????333???????????
2.??????
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2.???
«?????????(2022)»?????????,????????200?????????~350???????????????
3.???????????,?????????
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