| 摘要 |
Construction piece of the type which has a general parallelepipedal shape, being provided on their lateral faces with a recess 2 which defines a perimeter strip 3 with respect to both front faces, having, in relation to its front faces, a through or blind orifice 4, whilst the strips 3 of two of its lateral faces have a projection 5 and in the other two lateral faces parallel to them have a recess 6. <IMAGE>
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