| 摘要 |
The invention provides a large shuttlecock which can be used with a variety of bats or racquets for a game resembling badminton or a game combining the pleasure of badminton and tennis in that the spherical head portion has a size comparable to a standard tennis ball and is designed to bounce, the shuttlecock having a spherical or partially spherical head portion made from at least an outer layer of closed cell polymeric material of predetermined parameters relating to cell size, density, tensile strength and an elongation at break and having a skirt formation attached to it in association with a core unit which increases the average density of the spherical head portion to a predetermined value. |
