UNI 9737
Italian Language - QUALIFICATION OF WELDERS OF PLASTICS: WELDERS OF POLYETHYLENE COMPONENTS AND / OR POLYPROPYLENE, FOR THE CONVEYANCE OF COMBUSTIBLE GASES, WATER AND / OR OTHER FLUIDS UNDER PRESSURE, USING THE PROCEDURES FOR CONTACT HEATING ELEMENTS AND
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UNI 9737
Italian Language - QUALIFICATION OF WELDERS OF PLASTICS: WELDERS OF POLYETHYLENE COMPONENTS AND / OR POLYPROPYLENE, FOR THE CONVEYANCE OF COMBUSTIBLE GASES, WATER AND / OR OTHER FLUIDS UNDER PRESSURE, USING THE PROCEDURES FOR CONTACT HEATING ELEMENTS AND
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