depth of recess

• 凹下深度

depth of recess的用法和样例：

例句

1. According to submerging depth, the pumps are classed as lead bearing segment shaft structure and non-lead bearing long shaft structure.
   根据液下深度的不同，泵分为无导轴承悬臂轴和有导轴承分节轴两种结构。