Expanding Test: Ua ib qho kev sim nthuav dav ntawm submerged arc welded (SAW) ncaj seam steel kav los txhim kho lawv qhov tseeb qhov tseeb thiab txhim kho kev faib cov kev ntxhov siab hauv cov kav dej.
Magnetic Particle Inspection of Pipe Ends: Ua cov tshuaj ntsuam xyuas cov khoom sib nqus ntawm cov kav hlau kawg kom pom qhov muaj peev xwm tsis xws li tawg.
