Mortars for poundingとは 意味・読み方・使い方

The crushed sand, waste crushed stone waste materials and crushed stone scrap of squarish granular shapes withdrawn into the mortars are chipped off of their angles by the rice pounding effect and are rounded in their grain shapes, by which the fine aggregate for the high-quality concrete having the round granular shapes is obtained.例文帳に追加

臼の中にすくい込まれた粒形の角ばった砕砂や砕石廃材や砕石屑は米搗作用によってその角を削られて、その粒形を丸くし、粒形の丸い高品質のコンクリート用細骨材となる。 - 特許庁