H型钢的翼缘都是等厚度的，有轧制截面，也有由3块板焊接组成的组合截面。工字钢都是轧制截面，翼缘内边有1：10坡度。

Ｈ型钢的轧制不同于普通工字钢仅用一套水平轧辊，由于其翼缘较宽且无斜度(或斜度很小)，故须增设一组立式轧辊同时进行辊轧。

The flange of the H steel is equal thickness, has a rolling cross section, and a section of 3 plates. The I-steel is the rolling section, and the inner edge of the flange has the 1:10 gradient.

The rolling of H steel is different from ordinary I-beam only with a set of horizontal rolls. Because of its wide flange and no slope (or very ***all slope), a group of vertical rollers should be set up and rolled at the same time.

细木工板（俗称大芯板、木工板）是具有实木板芯的胶合板，其竖向（以芯板材走向区分）抗弯压强度差，但横向抗弯压强度较高。现在市场上大部分是实心、胶拼、双面砂光、五层的细木工板，尺寸规格为1220 mm×2440mm。

The woodworking board (commonly known as the big core board and woodworking board) is a plywood with solid wood core. Its vertical (core plate to differentiate) is poor in bending strength, but the transverse bending and bending strength is high. Most of the market is solid, plastic, double-sided sanding, five story blockboard, 1220 mm x 2440mm.

细木工板比实木板材稳定性强，但怕潮湿，施工中应注意避免用在厨卫。

细木工板的加工工艺分机拼和手拼两种，手工拼制是用人工将木条镶入夹板中，木条受到的挤压力差，不能据切加工，只适宜做部分装修的子项目，如做实木地板的垫层毛板等。

Blockboard is more stable than solid wood, but it is afraid of humidity. In c***truction, it should be ***oided in kitchen and toilet.

The processing technology of the carpenter board is divided into two kinds. The manual spelling is to insert the wooden bar into the splint, the squeezing pressure of the wooden bar is poor, it can not be cut by cutting, it is only suitable for the subproject of partial decoration, such as the cushion coat of the solid wood floor.