Who can help me out of a new building materials paper, thank you! 4000 words of the oh ..
New building materials are different from the traditional brick, lime and gravel and other building materials, new varieties of building materials, including a variety of varieties and categories
From the functional points, there are wall materials, decorative materials, doors and windows materials, insulation materials, waterproof materials, bonding and sealing materials, and its supporting a variety of hardware, plastic parts and various auxiliary materials
