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parallel bars 
Men’s gymnastics apparatus made up of two horizontal bars set at the same height; they are for performing various acrobatic exercises.
wooden bar
Bar whose gap is adjustable; it is usually 1.75 m above the floor.
adjusting tube
Part of the upright into which the vertical tube attached to the horizontal bar slides in order to adjust the height.
base
Rigid support to which the adjusting tubes are attached, which in turn support the bars.
