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.
工字钢的边长小，高度大，只能承受单方向的力。 H型钢槽深，厚度大，可以承受两个方向的力。
工字钢只能用于横梁，而H型钢才能用于结构的承重柱。
The length of the I-steel is ***all and high. It can only bear the force of the single direction. The H steel groove is deep and thick, and can bear the force of two directi***.
I-steel can only be used for crossbeams, and H steel can be used for structure bearing columns.
有的胶合板是将两个不同纹路的单板贴在一起制成的，所以在选择上要注意夹板拼缝处应严密，没有高低不平现象。挑选胶合板时，应注意挑选不散胶的胶合板。如果手敲胶合板各部位时，声音发脆，则证明质量良好，若声音发闷，则表示胶合板已出现散胶现象。
Some plywood plywood is made of two different lines of the single board together, so in the choice of the splints should be careful to pay attention to the joint, there is no uneven phenomenon. When choosing plywood, you should pay attention to selecting plywood without glue. If the hand knocks on the plywood parts, the sound is crisp, which proves that the quality is good. If the voice is stuffy, it means that the plywood has already appeared loose glue phenomenon.