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    21CrMoV5-7

    21CrMoV5-7
    21CrMoV5-7
    代號(hào):1.7709
    高溫機(jī)構(gòu)鋼
    化學(xué)成分
    C: 0.17-0.25
    Si: ≤0.4
    Mn:0.4-0.8
    S: ≤0.03
    P: ≤0.025
    Cr: 1.2-1.5
    Mo: 0.55-0.8
    Ni: ≤0.6
    V: 0.2-0.35
    Al: ≤0.03
    日日噜噜夜夜狠狠久久无码区,成在线人AV无码高潮喷水,2020亚洲国产精品无码剧情,最新无码国产在线播放
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