Abstract: The present invention provides an electrolyte solution including an ionic liquid having the structure of formula (I): wherein R1 is C1-C6alkyl, R2 is C2-C7alkyl, A? is defined in the specification. The electrolyte solution of the present invention has high conductivity and high thermal stability.

Abstract: A clamping seat has a disk, a positioning mount disposed on the disk, and a movable mount disposed on the disk. The positioning mount has a first curved face, a pair of first clamping blocks, and a pair of second clamping blocks. The movable mount has a second curved face, a pair of third clamping blocks, and a pair of fourth clamping blocks. A first screw rod passes through the positioning mount and the movable mount to engage with a butterfly nut. A second screw rod passes through the positioning mount and the movable mount to engage with a hexagonal nut.

Abstract: A saxophone has a main body, a neck, a treble connection set, a connection rod, and a link set. The main body has a high G hole and a high F sharp hole. A high G button and a high G cover are connected by the connection rod. The neck has a treble hole. A treble cover is disposed on the neck. A helical tube is connected to the treble cover to surround the neck. A treble button is disposed on a lower end of the treble connection set. The treble button has a groove. A high F sharp button and a high F sharp cover are connected by the link set.

Abstract: A saxophone has a main body, a neck, a treble connection set, a connection rod, and a link set. The main body has a high G hole and a high F sharp hole. A high G button and a high G cover are connected by the connection rod. The neck has a treble hole. A treble cover is disposed on the neck. A helical tube is connected to the treble cover to surround the neck. A treble button is disposed on a lower end of the treble connection set. The treble button has a groove. A high F sharp button and a high F sharp cover are connected by the link set.