| 摘要 |
PURPOSE: A grating is provided to form an upper member through-hole into various sizes and shapes and to prevent a wheel and the heels of shoes from escaping by being caught. CONSTITUTION: A grating (100) comprises an upper member (110), a lower member (120), and a gap forming member. The upper member is formed with one or more upper member through-holes (113). The lower member is formed in the lower part of the upper member with a gap. The lower member is formed with one or more lower member through-holes (123) in the different positions as the upper member through holes. The gap forming member is equipped in between the upper and lower members. |
