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There is disclosed herein a needle type inflation valve comprising a housing portion having a circumferential flange for securing the housing to a bladder and a frustoconical through opening which receives a valve core. The valve core is made of readily deformable material and has a relatively heavy flange on one end and a relatively thinner flange on the other. The end of the core having the thin flange is inserted into the housing at the larger end of the frustoconical through opening whereby the thin flange folds backwardly as the core is pushed through the opening and snaps outwardly beyond the smaller end of the opening.

The $h-p$ version of the finite element method with quasiuniform meshes