国产美女自卫慰视频福利APP_伊人久久五月丁香综合中文亚洲_两口子交换真实刺激高潮_国产A级毛片久久久精品毛片

XS-100鋼筋銹蝕儀(yi)采用極(ji)(ji)化(hua)電(dian)(dian)(dian)極(ji)(ji)原(yuan)理，通過銅/硫酸銅參比電(dian)(dian)(dian)極(ji)(ji)來測量(liang)混凝土表面電(dian)(dian)(dian)位(wei)，根據它銹蝕生產的(de)電(dian)(dian)(dian)位(wei)大(da)小(xiao)(xiao)或(huo)(huo)形成的(de)電(dian)(dian)(dian)位(wei)梯度大(da)小(xiao)(xiao)來判(pan)斷鋼筋是否銹蝕或(huo)(huo)銹蝕程度。