horizontal spacing between purlins
horizontal spacing between purlins
[城市规划英汉词典]
horizontal spacing between purlins步架
是什么意思，horizontal spacing between purlins的解释，horizontal spacing between purlins的翻译
horizontal spacing between purlins
[城市规划英汉词典]
horizontal spacing between purlins是什么意思，horizontal spacing between purlins的解释，horizontal spacing between purlins的翻译