超等; 特精密加工，特细号; 特细牙螺纹
1. 特细棉[棉花等级名称之一]：未成熟棉,发育不良之棉花 :Immature cotton | 特细棉[棉花等级名称之一] : Extra fine | 叶屑棉[含有叶屑的棉花] : Leafy cotton
2. 超细：微尘:fine particle | 超细:extra fine | 发根:Hairy root
3. 特别精密：External|外部的 | Extra Fine|特别精密 | Extract|提取
4. 特精密加工,特细号=>極細目：extra filling fabric ==> 特加纬纱织物 | extra fine ==> 特精密加工,特细号=>極細目 | extra fine fit ==> 特级精度配合,一级精度配合
1. extra fine
1. A twin on the left side is operating fine, but the astronauts will squirt on some extra grease as a precaution.