biconcave lens biconditional implication biconical biconical antenna biconical horn biconvex biconvex lens bicurved bicycle tyre bicyclic biddix bidecimal code bidematron bidentate bidentate ligand bidifferentiable bidirectional antenna bi-directional communication bidirectional counter bidirectional drive |
biconcave lens двойно вдлъбната леща Търсената дума е намерена |