| 摘要 |
The present invention relates to a block interlock offsetting key for use in the construction of a mortarless retaining wall wherein a plurality of blocks are stacked in offset rows or courses, the blocks of the wall being provided with top and bottom grooves. The block interlock offsetting key is able to interlockingly engage the bottom groove of a block and the top groove of an underlying block so as to offset the blocks a predetermined distance with respect to each other.
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