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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Accordingly, the wearing effect of the inner and the outer layers of the winter proofing trousers (two styles) is good, the design space is large, and the utility model has practicability.

从而使得防寒裤里、外层（两个款式）穿着效果更好，设计空间更大，更具实用性。

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Especially when construction in winter, climate specially cold, outside the temperature below zero degree Celsius, the new constructed fire proofing coating is all easy to ruin by freezing.

特别是在冬季施工时，气候特别寒冷，室外气温都在零摄氏度以下，新施工的防火涂料极易冻坏。

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