Narrow-gauge locomotive and rolling stock manufacturing; Electric motor manufacturing; Mechanical and electrical equipment manufacturing; Mechanical and electrical equipment sales; Mining machinery manufacturing; Mining machinery sales; Pipeline transportation equipment sales; Power transmission and distribution and control equipment manufacturing; Power distribution switchgear control equipment manufacturing; Transformer, rectifier, and inductor manufacturing; Metal processing machinery manufacturing; Foundry machinery manufacturing; Bearing, gear, and transmission component manufacturing; Non-residential real estate leasing.