jgg     2010 30 (Supp.2):  78-80    ISSN: 0412-1961  CN: 21-1139/TG STUDY ON PRECISION UNCERTAINLY IN MEASUREMENT Wan Shicheng 1) ; Xing Canfei 1) ; Li Hui 1) ; and Ling Mo 2) 1) Institute of Seismology, CEA, Wuhan 4300712)Wuhan Seicmic Metrological Verification and Surveying Engineering Centre, Wuhan 430071 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null