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Roller derby is a roller skating contact sport played on an oval track by two teams of five skaters. It is played by approximately 1,250 amateur leagues [note 1] worldwide, though it is most popular in the United States. [2] A 60-minute roller derby game, or bout, is a series of two-minute timed jams.
Roller, an element of a rolling-element bearing; Roller, used in rolling (metalworking); Roller, in a roller mill, to crush or grind various materials; Roller, or training surcingle, around a horse's girth
Roller skating is the act of travelling on surfaces with roller skates. It is a recreational activity , a sport, and a form of transportation. Roller rinks and skate parks are built for roller skating, though it also takes place on streets, sidewalks, and bike paths .
Skateboarding is an example of a roller sport.. Roller sports are sports that use human powered vehicles which use rolling either by gravity or various pushing techniques. . Typically ball bearings and polyurethane wheels are used for momentum and traction respectively, and are attached to devices or vehicles that the roller puts his weigh
Roller skates are shoes or bindings that fit onto shoes that are worn to enable the wearer to roll along on wheels. The first roller skate was an inline skate design, effectively an ice skate with wheels replacing the blade.
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A roller coaster is a type of amusement ride employing a form of elevated railroad track that carries passengers on a train through tight turns, steep slopes, ...
"It's a roller coaster," said Yosi Shnaider, a cousin of Shiri Bibas who was taken with her husband Yarden and children Ariel and Kfir, who were 4 years and 10 months old during the Hamas-led ...