ZK-SW400DC including one control box and two swing arm which suitable used in one channal(width 4~7) with
two doors,it mean one swing arm support one 2-3.5m width door with 400kg
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ZK-SW400DC including one control box and two swing arm which suitable used in one channal(width 4~7) with
two doors,it mean one swing arm support one 2-3.5m width door with 400kg