trimmer joist

常见例句

• A joist is any of a series of small parallel beams supporting a floor or roof.
  托梁是一系列的小列柱梁，用以支撐樓層或屋頂。
• The floor joist was cracked and fractured, but no debris was deposited in the basement, as the subflooring remained intact.
  地板托梁破裂折斷，但是在地下室竝未落下碎片因地板下麪安然無恙。
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