设计标高比路面低40cm的翻译：Design of lower elevation than the pavement 40cm 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Design elevation lower than the road 40cm

Design of lower elevation than the pavement 40cm

The design elevation is lower than 40cm the road surface

Markup designed more than 40 cm below surface

Design of lower elevation than the pavement 40cm