female mold

阴模，下半模

1. 阴模：female joint 套筒接合 | female mold 阴模 | female nut 螺母

2. 凹模,母模：凹面翼断面 hollow-faced blade section | 凹模,母模 female mold | 凹入 indent

3. 凹模：female die 凹模 | female mold 凹模 | femur 股