Abstract: A semi-closed local low-vacuum laser welding device and welding method is provided. The semi-closed local low-vacuum laser welding device includes a local low-vacuum cabin, a dynamic sealing structure, a mechanical pump, and a laser welding mechanism. The local low-vacuum cabin includes a primary vacuum chamber, a secondary vacuum chamber and a tertiary vacuum chamber which are arranged in sequence, and a plate to be welded is arranged at a bottom of the primary vacuum chamber. The dynamic sealing structure is arranged at the bottom of the primary vacuum chamber, and the dynamic sealing structure is configured for connecting the primary vacuum chamber with the plate to be welded. The mechanical pump is in communication with the primary vacuum chamber and the secondary vacuum chamber. The laser welding mechanism is arranged corresponding to the local low-vacuum cabin, and is configured for welding the plate to be welded.

Abstract: Embodiments of this application provide a security implementation method and apparatus, a device, and a network element. The method includes: receiving, by a first network element, first information, where the first information includes a device authentication code DAC and/or a service authentication code SAC; and the DAC is used to authenticate an association relationship between a first device and at least one second device, and the SAC is used to authenticate whether the first device and/or the at least one second device support/supports a service type indicated by service identifier information, and/or whether the first device and/or the at least one second device support/supports a data type indicated by data identifier information.

Abstract: Disclosed are a narrow gap laser-TIG arc hybrid welding apparatus and method. The welding apparatus includes a welding gun body, a swing welding gun assembly, a welding wire feeding and heating assembly, and a gas conveying assembly; the swing welding gun assembly includes a welding gun rotating shaft, a stepper motor, a large gear, a pinion, an upper insulating sleeve, a lower insulating sleeve, a tungsten electrode clamp, and a tungsten electrode; the stepper motor is mounted on a motor connection seat; the pinion is mounted on the output shaft of the stepper motor; the large gear is mounted on the welding gun rotating shaft; the pinion is engaged with the large gear; the welding gun rotating shaft is mounted and positioned on the welding gun body; the tungsten electrode is mounted at the tail end of the welding gun rotating shaft by means of the tungsten electrode clamp.

Abstract: The method for implementing security, applicable to a first device, includes: acquiring an authorization certification of a first network element, wherein the authorization certification is used to verify whether the first network element is authorized to receive data, the data being originated from at least one second device associated with the first device; and the authorization certification comprises a first digital signature; and determining that the first network element is authorized to receive the data from the at least one second device based on a successful verification on the authorization certification based on the first digital signature.

Abstract: A terminal device includes a processor and a memory. The memory is configured to store a computer program, the processor is configured to invoke and execute the computer program stored in the memory, to cause the terminal device to perform: acquiring an authorization credential of a first network element, where the authorization credential is used by the terminal device to verify whether a transmission of sensing data is authorized, and the authorization credential comprises a first digital signature; and authorizing the transmission of the sensing data, in a case where the authorization credential is verified successfully based on the first digital signature.