Non-metallic flexible pipes of rubber or plastic or containing rubber or plastic materials, non-metallic pipe junctions, non-metallic pipe jackets, all for use in the industrial transport of gas and industrial underwater transport of gas

FREEZERS, CRYOGENIC FREEZERS, BATCH FREEZERS, CONTINUOUS FREEZERS, SPIRAL FREEZERS, CABINET FREEZERS, FAST FREEZERS, FAST FREEZING TUNNELS, AND [ SHOCK FREEZERS; ] PARTS FOR THE AFORESAID GOODS