A crib having a drop side that vertically slides between lowered and raised positions includes a guiding and locking mechanism for the drop side, comprising a pair of lower guides and a pair of upper guides affixed to the crib’s corner posts, and a plurality of slides affixed to the drop side and slidably engaging the guides. More specifically, the invention provides peptides and conjugates and pharmaceutical compositions containing those peptides and conjugates that block fusion of a coronavirus, such as the SARS virus, to a target cell. The seal comprises a three-dimensional, high-density woven composite base structure recessed below the abradable coating, with loops incorporated in and protruding from the base structure. The present invention provides a VDST transmission system with a plurality of modems. The mask layer and the spacer are removed and a tunneling dielectric layer is formed over the substrate.