专利名称：METHOD FOR DETECTING FLAW OF CLAMP-TYPE PIPE JOINT AND ULTRASONIC PROBEPAIR USED FOR THE SAME发明人：ISHIBASHI SUSUMU，石橋 進,OTATSUNETOSHI，太田 常利,ISHIDA MASAHIKO，石田 昌彦,TANAKA HIDEJI，田中 秀二申请号：JP201206397...