A carpet, often heavy-duty, that is purchased in bulk for non-domestic use.

A waste pipe and a vent pipe which are in a straight line, the latter being a continuation of the

A level basin on a sloping site to catch rainfall.

A theater stage curtain which can be raised in separate folds by individual lines which are attached to its component

The vertical distance between adjacent contour lines.

A topographic map which portrays relief by the use of contour lines which connect points of equal elevation; the closer