略語大辞典 [Med] 15 HDLW hearing distance left watch 左時計可聴距離. 聴力指数. hearing distance left watch; an HD(hearing distance) at which a watch can be heard with the left ear; ref. HDRW(hearing distance right watch); [Med:Phys]. 丸善「略語大辞典」JLogosID : 11876718