凹进部分的英文

recess

• 凹进:    backoff
• 部分:    part; section; por ...
• 轮辋中部凹进部分:    wheel well

例句与用法

1. The contractile interior core pulling mould structure was designed for the molding of the concave part of inner side of outer casing of flow meter
   摘要为成型流量计外壳内侧凹进部分，设计了收缩内抽芯模具结构。