| 摘要 |
<p>An attachment for the boom structure and hydraulic system of a hydraulic excavator, including a pair of relatively swingable jaws for crushing concrete slabs and the like, each of the jaws having a grid like jaw structure with elongate rigid plates extending outwardly from the pivot structure, there being a multiplicity of tapered tooth like projections on the grid structure of the jaws, the tooth like projections being of various lengths, at least one of the jaws being connected to the hydraulic system to open and close the jaws to apply pressure and fracture concrete structures being gripped and crushed.</p> |
