Abstract: A covering employing a fascia gutter is disclosed. The fascia gutter includes a front member, bottom member, a rear member, a ledge, a guiding groove, a protrusion and a receiving space. The bottom member connects the front member to the rear member. The receiving space is defined by the front member, the bottom member, and the rear member. The ledge is connected to the rear member, and the guiding groove is defined in the ledge. An opening is defined by the ledge and the protrusion.

Abstract: Forming a channel letter box using a profile, including: determining an incision position on one surface of the profile where at least one surface incision is to be made; surface incising at the determined position; folding the profile at the incision position to form the channel letter box, wherein the profile comprises at least one protruding rib on one surface of the profile; and cutting and attaching a top plate to the channel letter box, wherein a thickness of the top plate is substantially close to a distance from the top of the profile to the top of a top rib of the at least one rib.

Abstract: A bifunctional chelating agent of the formula (I): wherein the variables R1, R1?, Q1, Q2 and M are as defined in the description of the present application. Also described is a complex of the above chelating agent to an ion of a stable or radioactive metal; a conjugate of the complex covalently attached to a biological carrier; and a pharmaceutical composition containing the conjugate.