Global 4-way Solenoid Valve Market By Type (Stainless Steel , Brass , Aluminium , and Plastic), By Application (Oil & Gas , Chemical & Petrochemical , Water & Wastewater , Food & Beverages , Power Generation , Pharmaceuticals , Automotive , Medical , and Others), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2020-2029