Hollow balls as refractory and thermal insulation material

Hollow balls as refractory and thermal insulation material

  • CN 2,261,548 Y
  • Filed: 12/06/1996
  • Issued: 09/03/1997
  • Est. Priority Date: 12/06/1996
  • Status: Active Grant
First Claim
Patent Images

1. , a kind of novel refractory heat-isolating hollow ball is hollow, is spherical, it is characterized in that there is projection on the ball surface.

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