Corrugated thin-wall tube in-situ deposited with concrete

Corrugated thin-wall tube in-situ deposited with concrete

  • CN 1,128,272 C
  • Filed: 03/15/2001
  • Issued: 11/19/2003
  • Est. Priority Date: 03/15/2001
  • Status: Active Grant
First Claim
Patent Images

1. , a kind of corrugated thin-wall tube in-situ deposited with concrete is characterized in that it is made up of horniness thin-walled tube and two plugs, and two plugs form an enclosed cavity with the horniness thin-walled tube closed at both ends, and described horniness thin-walled tube is a bellows.

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