内笼墙壁保留了原来的防火胶板表面，内机门亦然。

The interior walls have the original inflammable vinyl surfaces retained. So is the inner landing door.

youdao

内笼墙壁保留了原来的防火胶板表面，内机门亦然。

The interior walls have the original inflammable vinyl surfaces retained. So is the inner landing door.

youdao