1)commutator ammeter,转换开关式安培表2)ammeter switch,安培计转换开关，电流表转换开关3)AS (Ammeter Switch),安培计切换开关4)hybrid transfer switch,混合式转换开关5)throw over switch,投掷式转换开关6)transfer switch type,转换开关型式
用法例句
In these years,a new type transfer switch has been put forward a hybrid transfer switch which combines the solid state switches and the mechanical switches.
