thin-walled box structureとは 意味・読み方・使い方

(1) The core structure of the run-flat wheel has a form in which each core 10 has a thin-walled box 11 whose upper surface 13 is closed and whose lower surface is open and a lattice plate 12 formed in a box for reinforcement.例文帳に追加

（１）各中子１０が、上面１３が閉じ下面が解放した薄肉の箱１１と該箱の中に補強のために設けられた格子板１２とをもった形状を有しているランフラットホイールの中子構造。 - 特許庁