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【Daily Question】Utilities - Mechanical & Electrical - 20191115

2019-11-15View Original

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The testing method that relies on the relationships between sound speed values, rebound values, and concrete strength as a basis, measures certain physical properties of concrete under natural conditions, and then uses these relationships to estimate the characteristic strength of the concrete is called ( ).    A. Electromagnetic induction method B. Pulse electromagnetic wave method C. Radiographic testing method D. Ultrasonic testing method Answer: D

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