Unverified83% confidenceFactTime unknown
框内安装（窗洞内）需精确测量宽高各处取最小值并预留5-10mm间隙防卡，框外安装（覆盖窗洞）宽度需比窗洞两侧各多出3-5cm提升遮光并遮挡边缘缝隙
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