In a shade system with a bracket supporting a shade storage roll, an anti-reversible power spring apparatus includes a biasing member and a housing with a receiver end and a connector end where the housing encloses the biasing member and the receiver end and the connector end contain the biasing member within the housing. And a VA-mode liquid crystal display device having the optical compensation film, disposed between the liquid crystal cell and each of the pair of polarizing elements, is disclosed. A right nozzle head is movably secured to the central housing, wherein a portion of the left nozzle head and a portion of the right nozzle head extend into the central housing and move around a vertical axis passing through the central housing. % or less of a polyester resin obtained by recycling PET bottles, wherein the content of an isophthalic acid component in all dicarboxylic acid components in the entire polyester resin composing the polyester film is 0. Both of the first and third contact parts are used for making an electric contact outside the connector entity. A unique backup is stored on second archive storage media, the unique backup including the unique data a reference to the core backup stored on the first archive storage media.