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Beijing earth long Co.,Ltd is an high-tech enterprise, with more than 30 years hi-story on development and production of geophysical instuments. Our instruments and tec-hnology have won many national, provincial and ministerial awards and achievement , wi-dely used in geological prospecting, hydrology , engineering survey, structure quality testing, fields of earthquake monitoring and prediction, and has passed ISO9001:2000 q-uality management system certification.
DJGW bar location series, DJLC-A floorslab calibtrater, DJUS - 05 non-metallic ult-rasonic instrument,DJCS - 05 fracture depthometer, HT225W fully automatic digital... |
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Fiber Brag Grating
