<div>Ambient temperature conditioning Before determination of the cross-sectional area, all test pieces shall be protected from direct sunlight and maintained for at least 3 h at a temperature of (23 ± 5) °C, except for thermoplastic insulating materials which shall be kept at (23 ± 2) °C.</div>
[billma 在 2014-1-8 12:08:25 編輯過]