covering of buried drain piping

covering

— noun an artifact that covers something else (usually to protect or shelter or conceal it) — noun the act of protecting something by covering it — noun (= cover) a natural object that covers or envelops under a covering of dust the fox was flushed from its cover — noun (= cover) the act of concealing the existence of something by obstructing the view of it the cover concealed their guns from enemy aircraft — noun (= application, coating) the work of applying something the doctor prescribed a topical application of iodine a complete bleach requires several applications the surface was ready for a coating of paint

of Preposition

— Made using. It is a house of cards.

buried Adjective

— If a body of a person is buried, it is put into a gravesite. — If something or someone is buried, it is hidden; it is concealed.

drain Noun

— A drain is a hole, sometimes in the bottom of a basin, to let water flow out, and a pipe attached to the hole. After you wash, you should drain the water from the bath.

drain Verb

— Someone drains something when they take the water or other liquid out of it. She drained her cup in one gulp. The workers drained the wet land to make it a dry place to build houses.

piping

— adverb (used of heat) extremely the casserole was piping hot — noun playing a pipe or the bagpipes — noun a thin strip of covered cord used to edge hems — noun (= pipe) a long tube made of metal or plastic that is used to carry water or oil or gas etc