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ռһЩȫҎ

ʲôrҪʹðȫ

ǶϵIҪϵȫ

ՇҘ˜GB/T 3608-2008̎IּҎډ߶Ȼ2m(2m)п܉ĸ̎MIQ̎Iһr\ڿ{brǶϵIע⣺҃Ȼ1ⳬ^2׵ĸ̎Iԓʹðȫ

ʲôҪ_ʹðȫ

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ȫڰlrЧ≋䌦wľ޴̎¹ʽyӋ5mϵĵĸ߿I¹ʼsռ20%5mµռ80%ǰǴ¹ƺ20%ֻռ˔Сһһl100%Zһȫ

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lra޴@hһ˱˨cι̌oֹ

󲿷ֵĉ¹ʶͻlҲ͛]Еrg׌bˆTͱOoˆTȡʩ_ʹðȫǰȫõͬ

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