Operation of sand or gravel pits, basalt / porphyry, clay (ordinary), crushing and breaking of stone for use as a flux or raw material in lime or cement, manufacture or as building material, road metal or ballast and other materials for construction
Manufacture of dental fillings and cements (except denture adhesive or cement), dental wax and other dental plaster preparations; manufacture of dental laboratory furnaces, dental instruments, artificial teeth, bridges, etc., made in dental labs
Retail sale of other household appliances n.e.c. ( security systems, such as locking devices, safes, and vaults, without installation or maintenance services etc. , wooden, cork and wickerwork goods, sewing and knitting machine and other household utensils and durables n.e.c.)