If you mean the symbol â, it means âcontains as an elementâ. The expression Aâx is equivalent to xâA, which means that x is an element of A and implies that A is a set. See Element (mathematics).
Concrete Floor Care 101. Concrete flooring is one of the most durable types of flooring you can install in your homeânot to mention it adds an interesting design element that is both contemporary and uncommon. Itâs also easy to maintain if you follow a few simple guidelines.
Sprung floors come in a few major types: 1  Traditional wood basket-weave. 2  Wood with high durometer neoprene pads. Sometimes both basket-weave and neoprene pads are used. 3  Foam rubber with a wood or other area elastic layer on top.