Hollow screw double silencing pipe

Hollow screw double silencing pipe

  • CN 2,382,938 Y
  • Filed: 08/17/1999
  • Issued: 06/14/2000
  • Est. Priority Date: 08/17/1999
  • Status: Active Grant
First Claim
Patent Images

1. The two Silencing tube materials of the draining hollow spiral that uses in a kind of construction engineering, it is characterized in that:

  • axial perforation is arranged in the tubing wall, and the honeycomb sound insulation hole of radially not reporting to the leadship after accomplishing a task is equidistantly distributing the triangle spiral bar that is no less than three on the pipe material inner wall.

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