Multi wrapping metal tube and making method and equipment

Multi wrapping metal tube and making method and equipment

  • CN 1,174,819 C
  • Filed: 02/15/1996
  • Issued: 11/10/2004
  • Est. Priority Date: 02/15/1995
  • Status: Active Grant
First Claim
Patent Images

1. multi wrapping metal tube, wherein the outside weld part is filled with cored solder, thereby forms perfectly smooth outer surface, and wall is the bonding mutually and leaving gap not with cored solder fully.

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