ovens and kilns including parts and attachments 33399429 35674 High frequency induction and dielectric heating equipment 3339944 35675 Electrical heat. equip. for industrial use, nec (exc. soldering irons) and parts and attach 3339945 356755 Industrial electric heating units and devices, except heating units for electric furnaces 33399455 356759 Parts and attach. for ind. furn. and ovens, includi