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joists的例句（joists在句子中的用法）
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Damp - proof membranes are also provided to isolate the walls, joists and floors from dampness rising capillarity.
防潮层也能隔绝墙壁, 屋顶和地板,避免由于毛细管作用而引起的潮气上升.
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Sections : Various shapes of cross - section for construction, such as beams, girders, joists, rails, angles, etc.
型材--横断面有各种形状,用于建筑, 如钢梁 、 槽钢 、 工字钢 、 钢轨 、 角钢等.
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The builders will have to strengthen the existing joists with additional timber.
施工人员将不得不另外用木料加固现有的托梁。