Inner doors in a dwelling house may fall into "fram door" and "Joinery door" this article will expound this manufacturing process according to their materials and structures.

住宅内门可分为“框架门”和“细木工门”，本文按其材料、结构分别阐述了制造工艺。

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Thus, at the opening of the emergency exit 11, the materials that may obstruct the emergency exit fall vertically in the direction of the arrow 12 to clear the emergency exit 11.

这样，在紧急出口11的开口处，可能阻塞紧急出口的物料沿着箭头12的方向竖直下落，以清理紧急出口11。

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