Pp plus pulley slide with aluminum alloy which is better?
Rigid waterproof casing is a steel pipe plus a wing ring (steel plate made of the ring on the steel pipe), installed in the wall (mostly concrete wall), for a sudden ridicule Guji nine consultative pipe through the wall, Wall waterproof; flexible waterproof casing in addition to the external wing ring, the internal file ring and the like, the flange wire, there are sets to sell, but also their own processing, for the need for shock absorber, such as water pumps When the pipe is connected to the wall
First explanation: EPS usually refers to foam polystyrene, is our most common foam. Polystyrene itself is a shocking museum Ji Yi pan turtle reed sea two flammable materials, foam or flammable materials. If only the foam polystyrene, this material is not fire, if a fire, this material will make the fire more rapid spread. Modification of the word in the plastics industry has a broader meaning, but here, generally refers to the flame retardant modification, specifically for the polystyrene flammable characteristics of the modified. As for the fire performance, the state has a clear standard. The national standard for building materials is GB8624-. grade A. A. B, C, D, E, F, you can ask suppliers of their modified polystyrene board to achieve a specific which level.
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