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Heavy-Duty Elevator – Machine Room Less

Heavy-duty elevators are used in mass railway transit systems as rapid transit (metro), LRT. A. Design Criteria A. Operational requirements Hours of operation shall be considered as twenty-four (24) hours … Continue reading

Flash-butt Welding

The welding process is in principle a regulated electric short circuit with the two rail ends functioning as D.C. poles. The high current produces an arc between the rail ends, … Continue reading