31.   All the inside surfaces were wood, the fire smoke had blackened them and the heat produced a rich resinous smell of burning pine.

32.   The cut surface was firm and pale, but with no areas of necrosis.

33.   We had to ensure that all working surfaces were hygienic and dirt trap free, and that food could be transported without spilling.

34.   However, if a hard smooth surface is required royal icing is very effective.

35.   The tall surfaces were of steel tube, fabric covered.

36.   Although the surface is in reasonably good repair, the lanes are rather narrow and poorly lighted.

37.   Also, a wet surface is an ideal breeding ground for mildew, and mildew can cause decay of wood.

38.   Although surfaces are plastic, it is expensive, carefully fitted plastic.

39.   And a fast and grippy surface is one that lends itself almost exclusively to single-file racing.

40.   An ideal work surface should be of fire-resistant material like fire brick, ceramic tile or asbestos.