Items where Subject is "600 Technology/Teknologi > 660 Chemical Engineering and Related Technologies/Teknologi Kimia dan Ilmu yang Berkaitan > 662 Technology Of Explosives, Fuels, Related Products, Firework, Pyrotechnics/Teknologi Industri Bahan Peledak,Bahan Bakar,Teknologi Petasan, Piroteknik > 662.7 Coke and Charcoal/Industri Batu Arang dan Arang Kayu"