Improved lifting force device

Improved lifting force device

  • CN 101,823,415 A
  • Filed: 04/19/2010
  • Published: 09/08/2010
  • Est. Priority Date: 04/19/2010
  • Status: Active Application
First Claim
Patent Images

1. the lift unit of an improvement is characterized in that:

  • forms by the low soft tough and tensile sir-tight material of three layers of density, and promptly by outermost material, middle that layer material and innermost layer material composition;

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