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NA 092

DIN Standards Committee Welding and allied processes

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Technical rule [CURRENT]

DVGW GW 331
Welding supervisor for weldings at PE-pipelines for gas and water supply - Training and examination schedule

Title (German)

Schweißaufsicht für Schweißarbeiten an Rohrleitungen aus PE-HD für Gas- und Wasserversorgung - Lehr- und Prüfplan

Edition 1994-10
Original language German
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