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Under what circumstances will the drain cover produce sparks

Basically, it will not produce sparks in any place. The material of the drainage ditch cover plate is low carbon steel, stainless steel, resin, cast iron, and reinforced concrete. For example, the low-carbon steel drainage ditch cover plate is hot-dip galvanized, and no sparks will appear. The low-carbon steel drainage ditch cover plate will have sparks when it is polished with a grinding wheel during the production process. No other situation will arise.
According to the needs of the place, choose the drainage ditch cover plate suitable for the place. Like a wharf with a relatively large load-bearing requirement, the drainage ditch cover plate made of low-carbon steel is more suitable. The district is used as a drainage ditch. If it is not a car, in order to save costs, either cast iron or resin fiberglass grille can be selected.
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