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to phrases
national pipe
earth.sc. 〔美国〕标准管〔螺纹〕
American National Pipe
mech. 美制标准管
 English thesaurus
National Pipe
therm.eng., abbr. NP
national pipe: 52 phrases in 9 subjects
Automobiles5
Aviation14
Drilling1
Earth sciences2
General10
Mechanic engineering1
Mechanics15
Oil / petroleum1
Technology3