jgg     2012 32 (6):  152-155    ISSN: 0412-1961  CN: 21-1139/TG TECHNIQUE OF STRAIN OBSERVATION IN SOIL WITH SELF-CHECKING FUNCTION Qiu Zehua 1) ; Tang Lei 1) ; Lu Falin 2) ; and Zhang Baohong 1) 1)Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085;2)Wenan Seismostation of Earthquake Administration of Hebei Peovinve, Wenan 065800 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null