Section 16 Machinery and mechanical appliances; electrical equipment; parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers,and parts and accessories of such articles 84 Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof 84 81 Taps, cocks, valves and similar appliances for pipes, boiler shells... 84 81 30 Check (nonreturn) valves 84 81 30 00 Check (nonreturn) valves Commodity Code Description 84 81 30 00 000 Check (nonreturn) valves
