By 2022, Switchgear Market Size & Share Will Reach USD 156.8 Billion, Globally: Zion Market Research Sarasota, FL, Dec. 28, 2017 (GLOBE NEWSWIRE) -- Zion Market Research has published a new report titled “Switchgear Market (By Voltage: Low Voltage, Medium Voltage, High Voltage; By Insulation: Air,...