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A composite welding method
The present invention discloses a hybrid welding method, in particular for welding railway truck butt weld. The hybrid welding method comprising: welding the sheet which requires the preparation of a…
Drill stem with internal powder discharging function
The invention discloses a drill stem with an internal powder discharging function. The drill stem comprises a front segment, a rear segment and a drill bit, wherein the drill stem is hollow, a…
Lithium ion battery porous LiMn2O4 cathode material and the preparation method thereof
The invention belongs to the technical field of lithium ion batteries, in particular relates to a lithium ion battery porous LiMn2O4 cathode material and the preparation method thereof. The…
Metal cutting device and application method thereof
The invention discloses a metal cutting device and an application method thereof. The device comprises a cutter and a blade, the blade is located at a blade groove of the cutter, an L-shaped through…
Sleeper beam assembling method of railway vehicle and sleeper beam
The invention discloses a sleeper beam assembling method of a railway vehicle and a sleeper beam, and belongs to the technical field of the railway vehicle. According to the method, the shearing of a…