型材按生產(chǎn)方法可以分成熱軋型材、冷彎型材、冷軋型材、冷拔型材、擠壓型材、鍛壓型材、熱彎型材、焊接型材和特殊軋制型材等。型材按其橫斷面形狀可分成簡單斷面型材和復(fù)雜斷面型材。簡單斷面型材的橫斷面對(duì)稱、外形比較均勻、簡單，如圓鋼、線材、方鋼和扃鋼等。I-steelisdividedintothreekinds:ordinaryI-steelandlightI-steel,Htypesteel。復(fù)雜斷面型材又稱為異型斷面型材，其特征是橫斷面具有明顯凸凹分支。

厚鋼板的鋼種大體上和薄鋼板相同。在品各方面，除了橋梁鋼板、鍋爐鋼板、汽車制造鋼板、壓力容器鋼板和多層高壓容器鋼板等品種純屬厚板外，有些品種的鋼板如汽車大梁鋼板（厚2.5~10毫米）

The steel of a thick steel plate is roughly the same as that of a thin steel plate. In all aspects, in addition to bridge steel plate, boiler steel plate, automobile made steel plate, pressure vessel steel plate and multilayer high pressure vessel steel plate, some varieties of steel plate such as car beam steel plate (2.5~10 mm thick)

選擇膠合板主要看其甲醛釋放量和膠合強(qiáng)度。如果膠合板的膠合強(qiáng)度不好，容易散架。選擇時(shí)注意膠合板的標(biāo)稱厚度與實(shí)際厚度是否相符。

The choice of plywood mainly depends on its formaldehyde emission and bonding strength. If the gluing strength of plywood is not good, it is easy to fall apart. When choosing, pay attention to whether the nominal thickness of plywood is in line with the actual thickness.

認(rèn)清人造薄木貼面與天然木質(zhì)單板貼面的區(qū)別。前者的紋理基本為通直紋理，紋理圖案有規(guī)則；而后者為天然木質(zhì)花紋，紋理圖案自然變異性比較大，無規(guī)則。

Recognize the difference between man-made veneer overlay and natural veneer veneer. The texture of the former is basically straight texture, and the texture pattern is regular. The latter is natural wood pattern, and the natural variability of texture pattern is large and irregular.