acoustical conductivity of wood [木] 木材传声性 ; 木材的传声性
acoustical l conductivity 传声性
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Mechanical properties, fluid permeability, acoustical properties, heat conductivity and damping capacity were tested by testing methods and testing units that we design.
通过理论分析和典型试验，证明了温度对液体在橡胶中透过性测量的显著影响和保持试验环境温度恒定的必要性。
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