Line markers for tennis courts and the like
Line marking apparatus incorporating line marking head
Line system for playing field
Locking device for a detachable skate of sports shoe
Locking device particularly for snowboards
Locking mechanism for an ice skate blade
Longitudinal adjustment device notably for ski bindings
Longitudinally adjustable ski pole
Longitudinally releasable safety ski binding
Low friction hockey skate blade
Lubricated plastic skating surface