普通工字钢和轻型工字钢的型号是用其腰高厘米数的阿拉伯数字来表示，腹板、翼缘厚度和翼缘宽度不同其规格以腰高×腿宽(b)×腰厚(d)的毫数表示，如“普工160×88×6”。

The ordinary beam and light I-beam model is the digital Arabia with its waist high cm number to represent, web and flange thickness and flange width of different specificati to the waist high (H) * (b) * waist leg width thickness (d). The number of said, such as "general 160 x 88 x 6"

随着科学技术和工业的发展，对材料提出了更高的要求，如更高的强度，抗高温、高压、低温，耐腐蚀、磨损以及其它特殊物理、化学性能的要求，碳钢已不能完全满足要求。

With the development of science and technology and industry, the material has put forward higher requirements, such as higher strength, high temperature, high pressure, low temperature, corrosion resistance, wear and other special physical and chemical properties, carbon steel can not fully meet the requirements.

装饰材料分为两大部分：一部分为室外材料，一部分为室内材料。室内材料再分为石材，板材、片材、型材、线材五个类型。

Decorative materials are divided into two parts: one is outdoor materials, the other is indoor materials. Indoor materials are further divided into five types: stone, sheet, sheet, profile and wire.

装饰板材是所有板材的总称，主要有：细木工板、胶合板、装饰面板、密度板、集成材、刨花板、防火板、石膏板、PVC板、铝扣板、铝塑板、三维板等。

Decorative board is the general name of all board, mainly: board, plywood, decorative panel, density board, integrated material, particleboard, fire board, plasterboard, PVC board, aluminum plate, aluminum plastic board, three-dimensional board, etc.