All the air inlet and outlet pipes, one-way valves, pulse upper and lower boxes, and the fan must be connected with a sealing strip on the flange and then fixed with screws. The screws and the sealing strip are all in a snakeskin bag. !
All inlet and outlet pipes, one-way valves, pulse up and down boxes, fan off for flange connection should be first pasted with sealing strip on the flange, and then fixed with screws. The screws and sealing strips are all in a snakeskin bag!