Ключевые слова: applying, architecture, assembly, background, bloody, brush, cleaners, closeup, color, construction, control of welding, crackers, defect, examination, fabrication welding, groove, grooves, industrial, industry, inspection, inspector, leak of fusion, liquid, nondestructive, penetrant, penetration, penetration testing, pipe, piping, porosity, process, quality control, quality control of welding, red, repair, root, root canal, root weld, spray, spray can, stainless, stainless steel, surface, technical, weld, weld connection joints, welder, welding, worker,