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balance beam 
Women’s gymnastics apparatus made up of a long horizontal bar, on which the gymnast performs static and dynamic balance exercises.
beam
Rectangular wooden or steel bar; it is 5 m long, 10 cm wide, 1.20 m above the floor and covered with a nonskid surface.
height adjustment
Crank for raising and lowering the uprights to adjust the beam’s height.
upright
Adjustable post supporting the beam.
