Gauges for pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads - Part 1:Verification of parallel internal and taper external threads
NORMA vydaná dňa 25.6.2008
Designation standards: GB/T 22091.1-2008
Publication date standards: 25.6.2008
Country: Chinese technical standard
Kategória: Technické normy GB