Natural stone test methods - determination of the dynamic modulus of elasticity by measuring the fundamental resonance frequency 天然石料试验方法.弹性的动态模量的测定
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Natural stone test methods - determination of the dynamic elastic modulus of elasticity by measuring the fundamental resonance frequency 天然石材试验方法.弹性的动态弹性模量测定
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Natural stone test methods - determination of the dynamic modulus of elasticity by measuring the fundamental resonance frequency ; german version en 14146 : 2004 天然石料试验方法.弹性的动态模量测定