暗渠 あんきょ排水 はいすい

ankyohaisui

1. Not surface drainage.; Not open drainage.

1. Was dark drain.; Was subsurface drainage.

1. Subsurface drainage with; Drainage with subsurface

1. Subsurface drainage; Hidden drainage

1. It is not French drain.; It is not a subsurface drain.

1. It's not French drain.; It's not a subsurface drain.

1. Was dark drain.; Was concealed drainage.

1. Hidden drainage; Underground drainage

1. Is not French drain.; Is not subsurface drainage.

1. Wasn't subsurface drainage.; Wasn't an underground drain.

1. Probably subsurface drainage.

1. It wasn't a French drain.; It wasn't subsurface drainage.

1. Wasn't a drainage ditch.; Wasn't a hidden drain.

1. Probably subsurface drainage.

1. Was not dark drain.; Was not a hidden drainage system.

1. If/when dark drainage…; If it were dark drainage…

1. If/when dark drainage ditches…; If dark drainage ditches were present…

1. If/when dark drainage…; If dark drainage exists…