地覆

(1)structural member consisting of a continuous horizontal timber forming the lowest member of a framework or supporting structure

(2)最も低い構成材の枠組みまたは支える構造を形成する継続的水平木材で成る構造的部材

(3)lowest support of a structure; "it was built on a base of solid rock"; "he stood at the foot of the tower"

(4)ある構造の最も下の支えの部分

(1)