Abstract: A method for improving manner of display of surveillance video to extract components or types of components for independent display from the video. The displayable components are divided into at least one subject. A repeating displayed list is created corresponding to the at least one component or type of component. The videos corresponding thereto can be displayed in turn based on the display list in response to a play instruction from user. An electronic device and a computer readable storage medium applying the method are also provided.

Abstract: A device absorbs shock in a pneumatic tool containing a body, a cylinder, a valve unit, a piston member, plural buffer springs, and multiple fitting sleeves. The body includes a grip and a fitting sleeve fitted with the grip. The fitting sleeve has a chamber, a close face formed on a first end thereof, and an opening formed on a second end thereof. Each fitting sleeve is hollow and includes a limitation length forming along a hollow extending direction and shorter than a largest length. Multiple positioning sleeves are defined between a close face of the fitting sleeve and an abutting portion of the cylinder, and the multiple positioning sleeves are hollow so as to accommodate plural buffer springs. Because the limitation length is shorter than the largest length, the plural buffer springs extend out of the multiple positioning sleeves respectively.

Abstract: An automatic air intake device for a pneumatic tool, and the pneumatic tool contains: a front segment, a rear segment, a body, a cylinder, a valve unit, a piston member, an elastic member, and automatic air intake device. The body includes a grip, a fitting sleeve, and an air passage; the fitting sleeve has a chamber, a closing face, an opening, and a notch. The cylinder is slidably fitted in the chamber and includes a room and a contacting fence. The valve unit is fixed between the room and the contacting fence, and the piston member is accommodated in the room and is pushed by high pressure air to move forward and backward. The elastic mechanism is fixed in the fitting sleeve and pushes the cylinder to move forward. The automatic air intake device includes a control shaft which has a close section and a guiding section.

Abstract: A shock absorption device for a pneumatic tool, wherein a pneumatic tool contains: a body, a cylinder, a valve unit, and a piston member. The body includes a grip and a fitting sleeve fitted with the grip, wherein the fitting sleeve has a chamber, a close face formed on a first end thereof, and an opening formed on a second end thereof. The cylinder slidably is fixed in the chamber and a part thereof extends out of the opening, the cylinder includes a room and an abutting portion adjacent to the close face. The valve unit is fixed between the room and the abutting portion of the cylinder. The piston member is accommodated in the room and slides forward and backward along a movement axis. Plural buffer springs are mounted in the chamber and abut against the close face of the fitting sleeve and the abutting portion of the cylinder.