国产日韩网站_免费国产在线视频_免费a级毛片在线播放_亚洲1卡2卡3卡4卡乱码精品_中文在线√天堂_国产色a在线观看_成人免费一区二区三区牛牛_人与牲动交xxxxbbbb高清_性一交一乱一色一免费无遮挡_永久免费在线观看视频

To build a steel plant which needs six parts

    Now the city in the ongoing construction, in many places need to be applied to the steel structure, especially the steel structure of the building houses. If you need to build one of these plants somewhere, which six parts will you need?
        1, embedded parts: (to stabilize the plant structure)
        2, the beam: C and H are generally used steel, (the middle of the height of the beam according to the span of the set)
        3, PURLIN: generally use C section steel and Z section steel.
       4, the pillars: the general use of H-beam, or C-shaped steel (usually with angle to the two C-shaped steel connection)
       5, tile: two, the first is a single tile (that is, color steel tile); the second is the composite board. (Note: the two layers of color coated with polyurethane or rockwool sandwiched to play the role of Dongnuanxialiang, there are noise effects of fire)
       6, support, pull bar, usually round bar.
        This is the most important six parts of a steel plant, the most common. Other parts are auxiliary, such as screws. More knowledge to pay attention to our website!