Ключевые слова:
Pipe fittings|Unions|Threads|Pipe connections|Wrapping tests|Screwed fittings|Test pressure|Bosses|Nuts|Stop valves|Corrosion tests|Synthetic rubber|Dimensions|Electroplating|Washers|Gas-supply meters|Size|Pipe couplings|Sulfur dioxide|Porosity|Liners (mechanical components)|Metal coatings|Gas valves