a级毛片免费观看网站,一级毛片视频在线,午夜黄色毛片,黄色性生活毛片 - www.jlw-cn.com

Insulating glass is a new building material with good heat insulation, sound insulation, beautiful and applicable appearance, and can reduce the self weight of buildings. It is a high-efficiency sound insulation glass made of two (or three) pieces of glass, using high-strength and high air tightness composite adhesive to bond the glass with the aluminum alloy frame containing desiccant.

Insulating glass has many advantages over ordinary double-layer glass, so it has been recognized by countries all over the world. Insulating glass is a glass product that evenly separates two or more pieces of glass with effective support and is bonded and sealed around, so that there is a dry gas space between the glass layers. Its main materials are glass, aluminum spacer, angle bolt, butyl rubber, polysulfide rubber and desiccant.