The present invention is directed to film coating systems for use on oral dosage forms such as compressed tablets and orally-ingestible substrates which have improved pearlescent qualities. Some embodiments of the invention allow encapsulation of cold rows through an enclosure and allow server fans to draw cold air from the cold row encapsulation structure to cool servers installed on the server racks. Moreover, the second-layer metal line layers are employed as the copper line layers. The clips permit a construction unit to be installed without the need for a worker to insert fasteners through the flange from outside the building structure. Methods for closing a fistula tract are also provided.