Sentence:  Hard surface cleaning in household application is represented by two classes of alkaline products : ( 1 ) the formulations made expressly for machine dishwashers , and ( 2 ) the general-purpose cleaners <WSD>used</WSD> for walls and woodwork . 
Meaning of the word marked with <WSD> tags:  put into service; make work or employ for a particular purpose or for its inherent or natural purpose