8:57 Cara Align Pipe Fittings Weldneck Flange Prosedur Drawing Inspektur PipingWeldingNonDestructiveExamination-NDT23 rb kali ditonton
17:02 Cara Align Pipe, Fittings, Siku, Flange Standar Bevel 37,5 PipingWeldingNonDestructiveExamination-NDT10 rb kali ditonton
