求翻译：在中密度纤维板正面开形式立体三角或圆柱形的槽，背面开圆孔的结构吸声材料，饰面喷漆（可按客户要求选择颜色），高密度纤维板，饰面喷漆，背贴防火吸音布。是什么意思？

Positive opening in the form of three-dimensional triangular or cylindrical groove in the medium density fiberboard, and the back of the open hole in the structure of sound-absorbing material, decorative painting (customers may be asked to select the color), high density fiberboard, decorative paint

Medium-density fiberboard in front on three-dimensional form 3 or the cylindrical-shaped corner of the socket hole on the back, the structure sound absorbing material, finishes can be painted (at the request of the customer choice of colors) and high-density fiberboard, and decorative painting, back

Opens the form three-dimensional triangle or the cylindrical trough directly in the density fiberboard, back opens the round hole the structure sound absorber, the facing sprays paint (may according to customer request choice color), the high density fiberboard, the facing sprays paint, the back pas

In front open forms of the medium density fiberboard stereo Groove of triangular or cylindrical, open structure with a circular hole on the back of sound-absorbing materials, decorative spray paint (color can be selected according to customer's request), and high density fiberboard, decorative paint