Main keel

Main keel

  • CN 201,891,205 U
  • Filed: 11/01/2010
  • Issued: 07/06/2011
  • Est. Priority Date: 11/01/2010
  • Status: Active Grant
First Claim
Patent Images

1. a main joist is characterized in that, comprising:

  • front side wall (1), two ends extend back the upper wall (6) and the lower wall (5) of arc about it, are equipped with the rider keel link slot on the lateral surface of upper wall (6) and lower wall (5).

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