PURPOSE: A multistage compressing blower is provided to blow wind at regular pressure and discharge volume regardless of discharge distance, thereby promptly providing air. CONSTITUTION: First and second cap housings(4,5) have predetermined first and second space parts(2,3) while having first and second axial holes(4a,5a) in the center, and have flanges(20,21) having coupling holes(18,19). A plurality of partition parts(6,7,8) is formed between the first and second cap housings. First to fourth impellers(9-12) are connected to a rotary shaft(13) passing through the center of a space provided by inner surfaces of the first and second cap housings and inner surfaces of the partition parts.
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