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Device for scraping off deposits from internal surfaces of elongated tubes










Image Number 2 for United States Patent #4315541.

Device for scraping off a deposit from the internal wall surface of an elongated tube of relatively small diameter, comprising a helical coil spring which is installed inside the tube and adapted to be reciprocally movable and/or rotatable, said spring scraping off the deposit from the internal wall surface of the tube.








 
 
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