Boxes for storage purposes (metal); Containers of common metal for storage purposes (other than household use); Containers of metal (storage, transport); Steel storage silos; Storage vessels of metal (other than for household use); Containers of metal in the nature of silos; Silos of metal; Metallic transportable constructions; Transportable constructions made of metal; Transportable structures of metal; Structural sections of metal for construction purposes; Transportable metallic constructions

Design engineering; Engineering design; Engineering drawing; Preparation of engineering drawings; Construction drafting