Other flooring is made from inch-thick mahogany which dented the tools of electricians and telephone mechanics who attempted to string new wiring in the 1950s.
It has been heavily exploited for its strong, dark red, resinous wood, which is useful for the construction of buildings, bridges, boats, and telephone poles.
To illustrate the example, we consider a telephone line provided to a customer, and we assume that both call forwarding and call waiting are enabled on the line.