Abstract: An underground gasifier pre-control structure includes a flame retardant injection system. The flame retardant injection system includes a flame retardant injection shaft pipe channel drilled from ground to a coal seam and a flame retardant injection channel located in the coal seam. The flame retardant injection channel includes a first flame retardant injection channel and a second flame retardant injection channel at both sides of each gasifier and a third flame retardant injection channel located in a horizontal direction of an adjacent gasifier. The first flame retardant injection channel includes a horizontal section along a strike of the coal seam and a bypass section offset toward the gasifier. The flame retardant injection system forms a wet coal wall in the coal seam to achieve pre-control for the gasifier. The pre-control structure wets the coal masses at both sides of the gasifier and the gasifier does not spread toward both sides.

Abstract: A self-locking mechanism for a gearing arrangement, a gearing arrangement, an actuator, and a lifting platform, which relate to the technical field of lifting tables. The self-locking mechanism includes a casing, a self-locking gear, and a brake member, the self-locking gear meshing with the gearing arrangement, the brake member being connected between the casing and the self-locking gear; in a case where the gearing arrangement pushes the self-locking gear forwardly, the brake member releases the self-locking gear, and in a case where the gearing arrangement pushes the self-locking gear reversely, the brake member brakes the self-locking gear.

Abstract: This application discloses a method for displaying chat information performed by an electronic device. The method includes: displaying chat information between a first account and a second account in a chat information display region of a target application, the first account logging into the target application at the electronic device; displaying a current status of the second account at the target application; and in response to an operation instruction executed on the current status of the second account, displaying an image corresponding to the current status in the target application.

Abstract: The present disclosure provides a method for interaction between terminals, implemented by a first terminal. The method includes: acquiring to-be-sent data; sending the to-be-sent data to a second terminal; displaying a display interface; monitoring whether first operation information from the second terminal is received, the first operation information including a processing operation received by the second terminal after the second terminal outputs the to-be-sent data and performed by a user of the second terminal on the to-be-sent data; and updating the display interface according to the first operation information once the first operation information sent by the second terminal is received. The present disclosure further provides an apparatus and a system for interaction between terminals. According to the present disclosure, data can be exchanged between terminals in real time, thereby improving interactivity between users of the terminals.

Abstract: The present disclosure provides a method for interaction between terminals, implemented by a first terminal. The method includes: acquiring to-be-sent data; sending the to-be-sent data to a second terminal; displaying a display interface; monitoring whether first operation information from the second terminal is received, the first operation information including a processing operation received by the second terminal after the second terminal outputs the to-be-sent data and performed by a user of the second terminal on the to-be-sent data; and updating the display interface according to the first operation information once the first operation information sent by the second terminal is received. The present disclosure further provides an apparatus and a system for interaction between terminals. According to the present disclosure, data can be exchanged between terminals in real time, thereby improving interactivity between users of the terminals.