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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