With a microscope and endoscope, a wide opening
on one or both sides of the frontal sinus was made to establish a Draf type II or III drainage.
The proprietary die has a relatively wide opening
(especially with long glass) so that material is deposited on the mold at low pressure and without damaging glass fibers.
To best assure the safety of the officials coming to offer their prayers at the Umayyades Mosque, a wide opening
was randomly bulldozed in the west rampart at the entrance to the mosque.