ultra rapid-hardening cement 急硬性セメント [きゅうこうせいせめんと]
unconfined compression strength, unconfined compressive strength 一軸圧縮強さ [いちじくあっしゅくづよさ]
underground pipe, conduit 埋設管 [まいせつかん]
unified soil classification system 統一土質分類法 [とういつどしつぶんるいほう]