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8177080 Girder block lifting method and jack-up stage used therefor  
A girder block lifting method, which can solve a problem that steel beams are inclined or fallen inward by lifting a heavy material, and a jack-up stage used therefor are provided. The method...
3602544 UNIVERSAL, HEAVY-DUTY SLING  
An aerial recovery system for enabling a helicopter to transport a disabled aircraft has two slings, each having three separate bands, for cradling the disabled aircraft at spaced points along its...
Matches 1 - 2 out of 2