ASTM C523-1968(1987) Standard test method for light reflectance of acoustical materials by the integreting sphere reflectometer
ASTM C523-1968(1987) 对声学材料由积分球反射撤回的光反射率的测试方法。
ASTM 903反射率测试 http://www.fire-test.com/teststandard/usa/7146.html
...
ASTM C523-1968(1987) Standard test method for light reflectance of acoustical materials by the integreting sphere reflectometer
ASTM C523-1968(1987) 对声学材料由积分球反射撤回的光反射率的测试方法。
ASTM 903反射率测试 http://www.fire-test.com/teststandard/usa/7146.html
...