安あん全ぜん係けい数すうあんぜんけいすうじ字FuriganaMeanings1nounsafety factorEngineering term: the ratio of a structure's strength to the expected load, used to ensure safety margins.この橋はしは安あん全ぜん係けい数すうを高たかめに設せっ定ていして設
