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Ӧô޷䳵£¶ӦΪö

Ҫкܶ࣬ټ棬ϣܹҡ

1ʱڣ迼Ƿڿù;

2»ת迼ǽƽ̨迼ᣬ8;(2.5)

3һػӱڣһٿգٿһ迼Ƿ(ʯ)з绯ӹ̴;

4µǷռڽṹλãر迼ڽ;

5ػӱػӱڻƣȲռ彨ռ䣬ʩҪͲ豸ѳֿɽÿһ¶;

ػӱ¶20%~25%Ϊˡ¶ȹ³⣬Ҳ׷ЩӶֱӽ̻еͲϵװӡ

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