发明授权
US6146293A Hockey puck having self-leveling means 失效
曲棍球有自我调平的意思

Hockey puck having self-leveling means
摘要:
A hockey puck having a cavity and a self leveling weight disposed therein for causing the puck to topple from its side to a face when rolling and for maintaining a face of the puck substantially parallel to the playing surface.
信息查询
0/0