| 摘要 |
PROBLEM TO BE SOLVED: To provide an embedded material for a concrete slab, a precast concrete slab and a void concrete slab, which enable a wiring pipe and the like to be easily laid without making the void concrete slab heavier. SOLUTION: In the embedded material 1 for the concrete slab, at least one arrangement groove 3 is provided along a short or long side of a top or under surface of an embedded material body, and a removable cover body 3 is mounted on the upper opening of the arrangement groove 3.
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