- 統(tǒng)一細(xì)牙螺紋
- unf unified national fine thread: 統(tǒng)一標(biāo)準(zhǔn)細(xì)牙螺紋
- unified extra-fine thread: 統(tǒng)一標(biāo)準(zhǔn)超細(xì)牙螺紋
- unified fine thread: 統(tǒng)一標(biāo)準(zhǔn)細(xì)牙螺紋
- unf thread: 統(tǒng)一標(biāo)準(zhǔn)細(xì)牙螺紋
- unified thread: 統(tǒng)一標(biāo)準(zhǔn)螺紋; 英美統(tǒng)一螺紋, abc螺紋
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