| 摘要 |
<p>A building block as an integral unit and formed complete by a single injection moulding process, having six faces with adjacent faces substantially perpendicular to one another and with at least two faces adapted to enable detachably interlocking engagement, by interlocking means, with a similar face of another building block or with one having similar conceptual design. Additionally the walls of the building block have substantially similar and uniform thickness.</p> |
