The polyphony board covered with aluminum foil of hollow wall is a new type of wall which heat insulation of aluminum foil has better heat preservation effect than cubage heat insulation.

缀铝箔聚苯板空心墙体是一种新型的保温墙体 ，其采用的铝箔绝热与容积绝热相比具有较好的保温绝热性能。

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A half-dozen anonymous workers scout ahead to check possible hive locations in hollow trees or wall cavities.

半达的无名工蜂在前方侦察，核查能够安置蜂巢的树洞和墙洞。

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The imaginary part is some construction space, such as the filler wall, railing, balcony, build parts, materials with hollow aluminum plate, various combination of the pattern is nine star.

虚的部分是一些建筑分隔，比如填充墙、栏杆、阳台、加建部分，材料用的是镂空铝板，其纹样就是九角星的多样组合。

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"This looks like wood paneling, but it's wallpaper, " he smiles, tapping the hollow wall behind the desk in his office.

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