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"

板材是指一般的压型钢板\平板等,都是较薄的钢板,通常都作为屋面或围护墙等用型材是指热轧的\冷弯的如工字钢\H钢\C型钢Z型钢,通常都作主结构用。

Plate refers to the general profiled steel plate, flat plate, etc., which are thin steel plates, usually used as roofing or retaining walls.

Profiles refer to hot rolled cold-formed ones, such as I-steel, \H steel, \C steel and Z section steel, which are usually used for main structure.

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.

①胶合板有正反面的区别。挑选时，胶合板要木纹清晰，正面光洁平滑，不毛糙，要平整无滞手感。

②胶合板不应有破损、碰伤、硬伤、疤节等疵点。

1.the difference between the plywood and the and negative sides. When selecting, plywood should be clear, ***ooth, ***ooth, and ***ooth.

2. Plywood should not be damaged, bruised, hard or scarred.