GB/T 17657-1999 Test methods of evaluating the properties of wood based panels and surface decorated wood-based panels[S].Beijing:Standards Press of China,1999.是什么意思_GB/T 17657-1999 Test methods of evaluating the properties of wood based panels and surface decorated wood-based panels[S].Beijing:Standards Press of China,1999.在线翻译_英语_读音_用法_例句