超声回弹综合法测强曲线在1 700~1 900密度等级轻集料混凝土中的应用研究
초성회탄종합법측강곡선재1 700~1 900밀도등급경집료혼응토중적응용연구
Study on application of strength curve based on ultrasonic rebound combined method to 1 700~1 900 density grade light aggregate concrete
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