AIR SLAB

摘要

The present invention relates to an air slab. According to an embodiment of the present invention, the air slab includes multiple hollow holes. The hollow hole comprises: first hollow holes located in a central portion and both end portions of the air slab; and second hollow holes located in the rest of the air slab corresponding to areas between the first hollow holes. The first hollow holes have relatively smaller cross sections than the second hollow holes.