Abstract: The present invention discloses a sealed HVDC relay, comprising an insulating hood and a yoke plate which is extended upward to form a cylindrical fixing portion; the insulating hood has an overturned cup structure; a chamber for accommodating moving contacts and stationary contacts is formed by the yoke plate and the insulating hood together; a lower end of the insulating hood and the fixing portion of the yoke plate are fitted with each other by threads; and the portion fitted by threads between the lower end of the insulating hood and the fixing portion is sealed by adhesive pouring. In the present invention, with the insulating hood made of ceramics, the stiffness of the relay structure of the present invention is promised. The absence of a brazing process makes the relay of the present invention short in manufacturing period and low in cost. With regard to the present invention, the sealing performance of the relay is promised by adhesive pouring, and a service voltage of the relay can be increased.

Abstract: The present invention discloses a single-wheel electric balancing scooter, comprising a wheel, a driving motor located within the wheel, a battery pack serving as a power supply of the driving motor, a self-balancing control system, and a balance signal sensor. A saddle is provided above the wheel; the saddle is mounted on a rack which is connected and fixed to a fixed shaft of the wheel; a handle is provided on a front side of the wheel, with a lower end of the handle being connected to the rack; and a front end of the rack is connected with an auxiliary wheel rack and an auxiliary wheel is provided at a lower end of the auxiliary wheel rack. The present invention has the following advantages that it is easier for driving and better to control the balance of the scooter body; the scooter body may be dragged on the ground; and the scooter body may be kept upright when not in use.

Abstract: A stable 6-methoxy-2?,3?-dideoxyguanosine comprises 6-30% water content. It is prepared by absorbing water in 6-methoxy-2?,3?-dideoxyguanosine with less than 6% water content at low temperature and certain humidity, or drying 6-methoxy-2?,3?-dideoxyguanosine with more than 30% water content. The stable 6-methoxy-2?,3?-dideoxyguanosine can be used to prepare medicament composition, and be used to manufacture pharmaceutical for fighting hepatitis B virus or HIV.

Abstract: A silicon anode battery comprises: a housing; a battery core comprising a cathode, a silicon anode, and a separator disposed between the cathode and the silicon anode; and an electrolyte comprising at least one lithium salt, a non-aqueous solvent, and an additive, wherein the additive comprises diallyl pyrocarbonate.

Abstract: A stable 6-methoxy-2?,3?-dideoxyguanosine comprises 6-30% water content. It is prepared by absorbing water in 6-methoxy-2?,3?-dideoxyguanosine with less than 6% water content at low temperature and certain humidity, or drying 6-methoxy-2?,3?-dideoxyguanosine with more than 30% water content. The stable 6-methoxy-2?,3?-dideoxyguanosine can be used to prepare medicament composition, and be used to manufacture pharmaceutical for fighting hepatitis B virus or HIV.