NATURAL TECHNOLOGY

Valves of metal (other than parts of machines); parts and fittings for all the aforesaid goods.;

Heat exchangers, being parts of machines; mechanical, pneumatic and hydraulic controls for machines, motors or engines; steam traps; valves, filters, strainers and pumps, all being machines or parts of machines; separators and air compressors, all being machines or parts of machines, lubricators and

Control, metering, monitoring, regulating apparatus and instruments; sight glasses and check valves fitted with sight glasses; control valves operated automatically by electric or electronic control, by solenoid or by temperature or other changes in physical conditions for regulating the flow of gas