outside water proofing
外部防水
以上为机器翻译结果，长、整句建议使用 人工翻译 。
It has excellent air tightness, water tightness, heat insulation, winter proofing and sound insulting property as the frame adopts the inside high and outside low design.
门框采用里高外低设计，气密性、水密性、隔热、防寒、隔音性能优越。
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