【上位】 (architecture) a masonry construction (usually curved) for spanning an opening and supporting the weight above it 通路の上にかかり、上部の重量を支えている（通例カーブした）石造構造。
日/英 »
【上位】 a device designed to provide additional strength; "the cardboard backing was just a strengthener"; "he used gummed reinforcements to hold the page in his notebook" 強さを増すために設計されたもの。
日/英 »
