Honeycomb grid brick with 37 holes

Honeycomb grid brick with 37 holes

CN
  • CN 2,888,380 Y
  • Filed: 07/04/2005
  • Issued: 04/11/2007
  • Est. Priority Date: 07/04/2005
  • Status: Active Grant
First Claim
Patent Images

1. , the cellular checker brick of a kind of 30 seven apertures in the human heads, it is characterized in that:

  • hole count is 37 holes on these checker brick, each aperture is ф

    33mm-ф

    20mm.

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