Mast section specifications can be devided into three specifications as follows.8008001508 and 6506501508 and 9006501508.type of construction have SCD dual drive3, count weight, no count weight of SC triple drive, built-in, upper-setting and frequency control etc, varieties. the equipment is applicable to bridges, chimneys, mansions above 60m etc, constructors and material handling of tall building of tall buildings, which is also used for warehouse and whart etc, places for vertical transportation.Our company newly-developed micro-control automatic leveling device, floor wireless beeper, overload voice annunciator(for users to choose from). The equipment has complete function, 3 function can be used independently and also assemble the same computer main chord randomly to become a whole and realize automatic operation.