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Basic line marking machines for turf were available by the late 1800s. [1]: 40 They were originally developed for use on lawn tennis courts.[1]: 40 One of the first such machines, a wheel-to-wheel paint transfer device, was developed by F.H. Ayres and "would be instantly recognizable by users of many of today's machines, which work on the same principle".
Coloured pitches are used to distinguish the field of play (green) from the run-off (red). The hockey pitch is rectangular in shape. The longer perimeter edges are called the side line, the opposing shorter edges are referred to as the back line and the portion of this between the goal posts is known as the goal line. The side line must measure ...
The chain gang. In gridiron football, the chain crew (commonly known as the "chain gang") is a crew that manages signal poles on one of the sidelines.There are three primary signal poles: the "rear rod" that marks the beginning of the current set of downs, the "forward rod" that marks the line to gain, and the "box" that marks the line of scrimmage.
The penalty area (colloquially "the 18-yard box" or just "the box") is similarly formed by the goal-line and lines extending from it, but its lines start 18 yards (16.46 metres) from the goalposts and extend 18 yards (16.46 metres) into the field. i.e. this is a rectangle 44 yards (40.23 metres) by 18 yards (16.46 metres).
A rugby league pitch (or field) is 68 m (74 yards) wide and 112–122 m (122–133 yards) long. The try lines (or goal lines) stand 100 m (110 yards) apart. On each one is a goal post that is 5.5 m (6 yards) wide and at least 16 m (17 yards) high, with a crossbar set 3 m (3.3 yards) above the ground.
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