Excuse me, the rainwater dumplings on the road are still dumplings. Which word should be used? Is there a national standard for cast iron dumplings? Is there a national standard for the composite manhole cover? Thank you

4 thoughts on “Excuse me, the rainwater dumplings on the road are still dumplings. Which word should be used? Is there a national standard for cast iron dumplings? Is there a national standard for the composite manhole cover? Thank you”

  1. It’s a tadpole.
    The pastor generally refers to a bamboo sheet that is cut and polished in the past. The two layers of vertical and horizontal layers are buckled together and raised in pot utensils such as pot, kettle, tripod. shape. Now there are some tweezers made of alloy materials such as polymerization materials, iron, aluminum, stainless steel, etc., plus the frame, it becomes a cage drawer. Here, the role of mules is mainly to support food, which is convenient for water vapor and calories to be better absorbed by food.
    It also appeared in the name of the water supply and drainage facilities and the name of the mechanical and equipment. For example, the hollowed manhole cover can be called a mule, and the metal net used in the water pipe to filter the impurities can be called the mule. The filtering head can also be called tweezers, and the metal network on the fuel tank mouth is also called dumplings. Here, the role of tweezers is mainly filtering.
    ì (bì) seeds are combed with bamboo and beef bone and other materials. There are beams in the middle and dense teeth on both sides.

  2. First, the correct word should be “rainwater”. The rainwater dumplings are welded by flat steel and twisting square steel or flat steel and flat steel. Rain -waters have the advantages of beautiful appearance, best drainage, high intensity, many specifications and low costs, so the steel grid ravioli dumplings are usually used. With the development of technology, a new composite water dumplings are formed with reinforcement with reinforcement and inorganic fillers with reinforcement and inorganic fillers. The advantage is that the self -weight is lighter than the cast iron dumplings. The cost is low. The disadvantage is that the strength is not as high as the cast -iron water dumplings.
    . The current national standards are generally “Cast iron manhole cover inspection” and GB6414-86 “Grave iron manhole cover size tolerance” where: “Standard manhole cover and the size deviation of the 360kn stipulated in the” Cast iron manhole cover inspection “meets national standards: GB6414 -86 CT12 -level “Grave iron manhole cover size tolerance” requires the surface of the manhole cover to spray anti -rust asphalt and paint anti -corrosion treatment!
    . In order to improve the quality of the cast iron manhole cover The well cover and the well ring are uneven. When the car is driving, it causes impact. A flexible buffer pad is installed between the manhole and the frame, and the fire shock sounds are installed. Or the contact surface of the manhole cover and the manhole frame uses mechanical processing facilities (only round products), which combines flatness.
    2. To prevent the manhole cover from being stolen when the manhole cover is installed outdoors, the manhole cover can be equipped with locks. The above locking device is used at the same time to form a complete anti -theft device.
    3. The faults of other materials such as manhole cover and other products are manifested in sudden breaks and crushing, so that black holes are suddenly formed on the ground. The failure form of the ball ink cast iron manhole cover is bent and deforming.
    4. The use of manhole covers and other products is affected by the use conditions and environmental conditions, such as corrosion, acid rain and underground pipe network system gas corrosion, and car tires to wear, and the effect of effective loading continues to decrease. The ability to resist these factors in the ball ink cast iron manhole cover is greater than other material manhole covers.
    5. The life of other material manhole covers depends not only on its bearing capacity, but also on its internal crack expansion speed.

  3. Gracence is generally available, and the cast iron mules have national standards. The labeling atlas “05S518”. There is no relevant standard for the composite manhole cover for the time being.

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  4. Rain -waters, generally the size of the specifications will not be worse than 3 cm /User/haoke258/newsshow.asp?id=35027 What specifications.

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