1. 牙槽:牙槽 socket | 牙槽 tooth socket | 牙槽板 socket plate
2. 齿槽:tooth shells 掘足类 | tooth socket 齿槽 | toothed 有齿的
3. 齿窝:06.1517 副齿 supplementary tooth | 06.1518 齿窝 tooth socket | 06.1519 中央齿 central tooth
4. 牙套:tooth sides fit of spline == 在键齿侧配合 | tooth socket == 牙套 | tooth sockets == 牙槽