Language
R3/4 (3/4-14 NPTF)
R1 (1-11 1/2 NPTF)
R1-1/4 (1-1/4 11 1/2 NPTF)
R1-1/2 (1-1/2 11 1/2 NPTF)
GB /T 14780 - 2010
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