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。
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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