| 摘要 |
A building block that can be assembled into structures without requiring special end or corner pieces. The block has top and bottom surfaces that contain a cooperating projection and slot for stacking the blocks. Two end surfaces and two side surfaces complete an enclosed volume. One side and one end surface has at least one interlocking male portion. The other side end surface has at least one cooperating slot portion into which the male portion fits to interlock the blocks.
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