0 votes

What is the meaning of(draining the water down) from the book(TREATMENT OF WATER—DESIGN AND OPERATION CONTROL) the Complete sentence is:

(This is done by draining the water down to

6 in. below the surface of the sand bed and scraping about 1 in.)
in Text Translation by (140 points)

Please log in or register to answer this question.

1,724 questions
1,928 answers
28,205 users