What does a coupler attach to a bag ?
A device used on a pipe organ or harpsichord to allow a player to play multiple divisions at once , by means of " coupling " a division to another at either sub , super , or octave pitches ; A valve , specifically a tap , for controlling the release of beer out of a keg ; A short length of pipe with two female threads , see coupling ( piping ) ; A sound artisu coupling ( sound ) ; A quick coupler used in construction machines to allow the rapid change of buckets ; The name given to the floating link in a Four - bar linkage Coupler is a data toll that allows coupling of data from different sources .