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The M-Stock built originally by Metro Cammell (now Alstom) and refurbished by United Goninan . They are in service on Kwan Tong Line, Tsuen Wan Line, Island Line and Tseung Kwan O Line. The maximum speed of M-stock is 80 km/h.

Tsuen Wan 綫, Hong Kong Island 綫 and general the Australian line entire line and the Guantang 綫 major part fine admires (already the British system train which with the vehicle use by the British capital city by France's Alston purchase) makes, the highest speed amounts to 80 kilometers.