41. Rather, it was merely a curved surface . 42. "It's linear on a curved surface . 43. In some optical layouts combiners may also have a curved surface to refocus the image from the projector. 44. In 1938, Lars Ahlfors generalised the lemma to maps from the unit disk to other negatively curved surfaces : 45. The decal is flat when you begin, and you are trying to lay it on a curved surface . 46. The wavefronts are two-dimensional curved surfaces . 47. The working face of the suction cup is made of elastic, flexible material and has a curved surface . 48. The toothbrushes, bristle brush and awl will be handy for working on curved surfaces and in narrow gaps. 49. The roof of the hall was built with curved surfaces made of prestressed concrete and filled with glass. 50. Cement board is also fabricated in thin sheets with polymer modified cements to allow bending for curved surfaces .
