Abstract: A system for adjusting steering damping based on sound frequency analysis includes: an acoustic main body configured to play music and determine whether the music is being played; a sound collection device configured to collect a sound signal of the music being played; a sound frequency analysis device configured to receive the sound signal of the music collected by the sound collection device and determine whether the collected music has a strong beat; and a power steering electronic control unit electrically connected to the sound frequency analysis device and configured to receive a determination result of the sound frequency analysis device and adjust the steering damping according to the received determination result of the sound frequency analysis device.

Abstract: A lined sleeve for tube welding is in the form of an inner tube including a first protruded portion and a second protruded portion. The first protruded portion and the second protruded portion are respectively received in two ends respectively of two tubes to be welded together. The inner tube further includes a recessed portion between the first protruded portion and the second protruded portion.

Abstract: A lined sleeve for tube welding is in the form of an inner tube including a first protruded portion and a second protruded portion. The first protruded portion and the second protruded portion are respectively received in two ends respectively of two tubes to be welded together. The inner tube further includes a recessed portion between the first protruded portion and the second protruded portion.

Abstract: A local resistance heating device, with a controlled atmosphere, includes two end members and a mid member. The two end members are respectively connected with an anode pole and a cathode pole. Each end member has an air channel. The air channel of one of the end members is adapted to connect with an output terminal of a gas supplier, and the air channel of the other one of the end members is adapted to connect with a sucking terminal of the gas supplier. The mid member is arranged between the two end members. The two end members and the mid member jointly define a heating room communicating with the air channels of the two end members.

Abstract: A local resistance heating device with a controlled atmosphere, which includes two end members and a mid member, is provided. The two end members are respectively connected with an anode pole and a cathode pole, each end member has an air channel, the air channel of one of the end members is adapted to connect with an output terminal of a gas supplier, and the air channel of the other one of the end members is adapted to connect with a sucking terminal of the gas supplier. The mid member is arranged between the two end members, wherein the two end members and the mid member jointly define a heating room communicating with the air channels of the two end members.