YOU SAID:

Large deep excavation pits are very large.

INTO JAPANESE

大深度掘削ピットが非常に大きいです。

BACK INTO ENGLISH

Large and deep excavation pit is very large.

INTO JAPANESE

大規模・大深度掘削ピットは非常に大きいです。

BACK INTO ENGLISH

Large and deep excavation pit is very large.