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On June 4, 2015, Huashang Daily reported on Xi'an Metro Line 3's track laying, featuring Aigre's mobiles Flash Welding Machine. The operation inspired Aigre employees, who vowed to continue contributing to railway construction.

During Line 3's track laying, Aigre's welding machine clamped two tracks, started welding under computer control with sparks flying, and automatically adjusted positions. Each weld took 139 seconds, increasing efficiency from 8-10 seams per shift to over 30, ensuring reliable quality.