| 摘要 |
A barrier provided by a plurality of wires, spaced apart one from the other and crossing between spaced apart elongate members, at least one of the wires having a bulbous end, and a first of the elongate members having an aperture either in or attached thereto, through which, in one position, the bulbous end of the wire is adapted to pass through, and in a second barrier providing position , is intercepted against withdrawal there from. |
