“椽”的拼音为：chuán...

椽是用木做的。The rafters are made from ash.请用手电筒照房椽.Shine the torch up into the rafters, please.椽木支撑住屋顶的重量.Rafters carry the weight of the roof....

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“装椽于”的英语可以翻译为：after ...