weeper drain；weep drain；drainage ditch；drain ditch
drain castinghollow casting drain tile
3D-ordered porous material
a new-type porous fence
a Porous Biomaterial Gelatin-Bletilla hyacinthine
accumulation of porous surrounding rock
active and porous agent
Al 2O 3 meso-porous composite film
Ammonium Nitrate Porous Prills
amphipathic porous microsphere
anisothermal porous flow
anodic porous alumina template
Asphalt Treated Porous Base
average porous diameter