base-base correlation

weeper drain；weep drain；drainage ditch；drain ditch

drain castinghollow casting drain tile

Dexamethasone Base，Betamethasone Base

sub-base and base

‘zero’ drain

acid drain cleaners

active drain hold-up tank

active drain tank

active-effluent drain pipe

actuator oil drain

aft water drain mast

after drain line

aftercooler air chamber drain

aftercooler drain

agricultural drain

agricultural drain pipe

air drain

air drain valve

air inlet drain