The medial wall of the sac is excised, facilitating drainage of tears into the nasal cavity.

The surface is laser leveled with a slight crown in the center to facilitate drainage.

Most if not all farms employ earthworks such as laser levelling to facilitate drainage and improve water use efficiency and uniformity.

The tunnel should have a slight gradient to facilitate drainage of water.

Hundreds of holes are drilled beneath its surface, filled with rock, to facilitate drainage.

The preferred orientation was on a gentle slope, with the arms extending downhill, to facilitate drainage.

When lying down, keep limbs above the heart level, if possible, to facilitate drainage.

The new road was also raised, and ditches were added to facilitate drainage.

Some soughs include branches to facilitate further drainage.

The tank bottom forms a gas tight seal against the foundation and is "coned up" to facilitate drainage to the periphery.