ball catch
A door fastener having a contained metal ball which is under pressure from a spring; the ball engages a striking […]
General
General
General
balk, baulk
1. A squared timber used in building construction. 2. A low ridge of earth that marks a boundary line.
General
ballast factor
The ratio of the luminous output of a lamp when operated on a ballast to its luminous output when operated
General
ballast noise rating
A measure of the noise generated by a fluorescent lamp ballast; designated by letters from A (the quietest) through F