What is Five Nations Roller Derby Championships?

The French National Track Championships are held annually and are composed of competitions of various track cycling disciplines across various age and gender categories.

The Dutch Marathon Championships is a speed skating event composed of two championships. One on natural ice and one on artificial ice.

The Australian National Road Cycling Championships are held annually and are composed of competitions of various road cycling disciplines across various age, gender, and disability categories.

The Skiff Championships Regatta is the premier skiff racing regatta on the River Thames in England. It is held annually at Henley on the Sunday of August Bank Holiday weekend....

In geometry, a developable roller is a convex solid whose surface consists of a single continuous, developable face. While rolling on a plane, most developable rollers develop their entire surface...

African Sambo Championships are the main championships in Sambo and Combat Sambo, organized by the African Sambo Confederation. Sports championship

A spherical roller thrust bearing is a rolling-element bearing of thrust type that permits rotation with low friction, and permits angular misalignment. The bearing is designed to take radial loads,...

A screen roller or spline roller is a small hand tool used to press screen mesh into the edges of a window frame that is fluted on the inner edges,...

The Roller Coaster Yard Sale, sometimes referred to as the Roller Coaster Fair, is an outdoor second-hand sale held annually for three days beginning the first Thursday in October. It...

Vertical roller mill is a type of grinder used to grind materials into extremely fine powder for use in mineral dressing processes, paints, pyrotechnics, cements and ceramics. It is an...