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            • 混凝土應變計

              振弦式混凝土應變計適用于長期埋設在混凝土結構的梁、柱、樁基、支撐、擋土墻、水工建筑物、襯砌、墩與底腳及其巖中,監測其應力與應變

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            无码国产精品一区二区电影
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