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national taper pipe
 National Taper Pipe
earth.sc. 国家标准锥管
| thread
 thread
gen.
dat.proc. 调度单位; 线索
hydroel.st. 线; ; 螺纹
IT 线程;

to phrases
National Taper Pipe
earth.sc. 〔美国〕国家标准锥管〔螺纹〕
American National Taper Pipe
mech. 美制标准锥管
national taper pipe thread
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