亚洲性爱视频免费板_一区二区日韩无码_国产精品国产三级国āV麻豆_亚洲成人黄色大片在线_日韩三级久久精品_97國產婷婷綜合在線視頻_2021天天做夜夜爽网站_最新厕所偷拍网址_日韩免费一级视频_4ayy成人毛片免费

The difference between electrically controlled fire doors and ordinary fire doors: Differences: Emergency and statistical functions. The system can automatically display the physical location of the designated cardholder on the computer, making it easy to contact them in a timely manner.

Steel wood fire doors, also known as wooden and iron sheet fire doors, use double-layer wooden boards wrapped in galvanized iron sheet or double-layer wooden boards with single-sided gypsum board wrapped in iron sheet, or double-layer wooden boards or double-layer asbestos wrapped in iron sheet. The new standard for fire doors stipulates that steel wood fire doors are doors made of steel and fire-resistant wood materials or fire-resistant wood products, with door frames, door frames, door panels, and door fillings made of non-toxic and harmless fire-resistant insulation materials, and equipped with fire-resistant hardware accessories, which have certain fire resistance performance.

Wooden fireproof doors are made of wooden materials as the frame and frame of the door leaf. This is not ordinary wood, but is processed through multiple flame retardant processes to achieve non combustible performance.

In today's era of frequent disasters, fire doors can effectively isolate dangerous flames and smoke in the event of a fire, and can become a life-saving "door to life and death". Daily fire doors need to be cleaned and maintained regularly in order to better function in the event of a fire. Do you know how to clean and maintain fire doors? Below are some tips for cleaning and maintaining fire doors.

Anti theft doors are important tools for preventing theft in households. Nowadays, many households have installed anti-theft doors. Some high-quality anti-theft doors have a long service life, but even if they have a long service life, they can still cause a lot of trouble if not maintained properly. Therefore, it is essential to understand the correct knowledge of anti-theft door maintenance. The anti-theft door currently in use should be maintained once a year.

Industrial lifting door: Industrial lifting door, also known as industrial sliding door. According to different operating modes, industrial doors are divided into standard lifting industrial doors, vertical lifting industrial doors, high-level lifting industrial doors, sliding industrial doors, segmented lifting industrial doors, European industrial rolling shutter doors, etc.

Fireproof rolling shutter door is a type of fire prevention and insulation facility suitable for large openings in buildings, which plays a certain role in the design and installation technology of the product.

Imitation copper doors are painted on the surface with a color similar to that of copper doors, making them look similar to copper doors, so they are called imitation copper doors. From the literal meaning, imitation copper doors refer to products that are not copper doors, but belong to a series of copper doors. It is a kind of imitation processing effect of copper doors.