[Safety engineering approach to public accident prevention. 1. Drowning alarm].
D000056:Accident Prevention / Q000295:instrumentation*; D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D004332:Drowning; D006801:Humans; D007223:Infant; D007564:Japan; D008875:Middle Aged; D013550:Swimming