American National Standards Institute. (1988). Recommended Practices and Procedures for Welding Low Carbon Steel Pipe - ANSI/AWS D10.12-89. American: American Welding Society.
Styl cytowania ChicagoAmerican National Standards Institute. Recommended Practices and Procedures for Welding Low Carbon Steel Pipe - ANSI/AWS D10.12-89. American: American Welding Society, 1988.
Styl cytowania MLAAmerican National Standards Institute. Recommended Practices and Procedures for Welding Low Carbon Steel Pipe - ANSI/AWS D10.12-89. American: American Welding Society, 1988.
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