工字鋼也稱為鋼梁（英文名稱 I Beam)，是截面為工字形狀的長條鋼材。工字鋼分普通工字鋼和輕型工字鋼，H型鋼三種。工字鋼廣泛用于各種建筑結(jié)構(gòu)、橋梁、車輛、支架、機(jī)械等。

I-steel beam (also known as English name I Beam), is an H-shaped steel strip section. I-steel is divided into three kinds: ordinary I-steel and light I-steel, H type steel. I-steel is widely used in various architectural structures, bridges, vehicles, stents, machinery and so on.

型材按使用部門分類有鐵路用型材（鋼軌、魚尾板、道岔用軌、車輪、輪箍）、汽車用型材（輪輞、輪胎擋圈和鎖圈）、造船用型材（L型鋼、球扁鋼、Z字鋼、船用窗框鋼）、結(jié)構(gòu)和建筑用型材（H型鋼、工字鋼、槽鋼、角鋼、吊車鋼軌、窗框和門框用材、鋼板樁等）、礦山用鋼（U型鋼、槽幫鋼、礦用工字鋼、刮板鋼等）、機(jī)械制造用異型材等。其規(guī)格以腰高*腿寬(b)*腰厚(d)的毫米數(shù)表示，如150*78*9。按斷面尺寸大小分類。

①膠合板有正反面的區(qū)別。挑選時(shí)，膠合板要木紋清晰，正面光潔平滑，不毛糙，要平整無滯手感。

②膠合板不應(yīng)有破損、碰傷、硬傷、疤節(jié)等疵點(diǎn)。

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

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

特性:裝飾面板一般用于清油裝飾。表層薄而板是名貴木種，紋理天然、華美?；囊话闶悄z合板，性能穩(wěn)定可靠。

Features: decorative panels are generally used for oil decoration. The surface is thin and board is a valuable wood species with natural and beautiful texture. The base material is generally plywood, the performance is stable and reliable.