干缩湿涨
是指木材吸收水分而减小或增大其尺寸和体积。在安装地板时,地板与扣条的间距保持在8-10mm,要留有足够的缝隙,才能确保地板不至于发生膨胀起拱。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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