| 摘要 |
PROBLEM TO BE SOLVED: To provide a concrete product with a grating causing no sound such as a clatter on a traveling vehicle or the like and having no anxiety that the grating bounces high on the traveling vehicle. SOLUTION: The concrete product is equipped with a concrete product body 1 having an opening section 3 having the grating 2, an engaging member 9 provided to an interior wall section 5 downward of the opening section 3 and the grating 2 installed in the opening section 3 in an openable manner and, at the same time, having an engaging member 13 engaged with the engaging member 9. COPYRIGHT: (C)2005,JPO&NCIPI
|
