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  2. Balinese copperplate inscription - Wikipedia

    en.wikipedia.org/wiki/Balinese_copperplate...

    The Balinese copperplate inscription or Sembiran inscription is a collection of ten copper plate inscriptions, which were found in the village of Sembiran, Tejakula district, Buleleng Regency, on the northern part of Bali island. [ 1][ 2] All inscription plates have a date, which is between 922 and 1181 CE, so they include more than 200 years. [ 3]

  3. Laguna Copperplate Inscription - Wikipedia

    en.wikipedia.org/wiki/Laguna_Copperplate_Inscription

    Laguna Copperplate Inscription. The Laguna Copperplate Inscription (Filipino: Inskripsyón sa binatbát na tansô ng Laguna) is an official acquittance (debt relief) certificate inscribed onto a copper plate in the Shaka year 822 (Gregorian A.D. 900). It is the earliest-known, extant, calendar-dated document found within the Philippines.

  4. List of countries by copper production - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    Production trends in the top five copper-producing countries, 1950-2012. This is a list of countries by mined copper production. Copper ore can be exported to be smelted so that a nation's smelter production of copper can differ greatly from its mined production. See: List of countries by copper smelter production.

  5. Copper extraction - Wikipedia

    en.wikipedia.org/wiki/Copper_extraction

    Copper(II) ions migrate through the electrolyte to the cathode. At the cathode (reduction reaction), Cu 2+ ions are reduced in copper metal and Cu (s) plates out, but less noble constituents such as arsenic and zinc remain in solution unless a higher voltage is used. [52] The reactions involving metallic copper and Cu 2+ ions at the electrodes ...

  6. Mining in Malaysia - Wikipedia

    en.wikipedia.org/wiki/Mining_in_Malaysia

    Tin mining is one of the earliest type of mining operated in Malaysia, starting in the 1820s in Perak and in 1824 in Selangor. [1] The development of mining industries in Malaysia attracted many Chinese immigrants who came to the state in 18th and 19th centuries to work and develop the mines. [2] The majority of Malayan tin mined prior to the ...

  7. Velvikudi inscription - Wikipedia

    en.wikipedia.org/wiki/Velvikudi_inscription

    The Velvikudi inscription is an 8th-century bilingual copper-plate grant from the Pandya kingdom of southern India. Inscribed in Tamil and Sanskrit languages, it records the renewal of a grant of the Velvikudi village to a brahmana by the Pandya king Nedunjadaiyan Varaguna-varman I alias Jatila Parantaka (r. c. 768—815 CE) in c. 769-770 CE.

  8. Copper sheathing - Wikipedia

    en.wikipedia.org/wiki/Copper_sheathing

    Copper sheathing. Copper sheathing is a method for protecting the hull of a wooden vessel from attack by shipworm, barnacles and other marine growth through the use of copper plates affixed to the surface of the hull, below the waterline. It was pioneered and developed by the Royal Navy during the 18th century.

  9. Mamut Mine - Wikipedia

    en.wikipedia.org/wiki/Mamut_Mine

    Mamut Mine (Malay: Lombong Mamut) is an abandoned open-pit quarry mine located in the Ranau District of Sabah, Malaysia where from 1975 to 1999 various minerals primarily copper including some gold and silver were mined. The mine is known as Malaysia's only copper mine. It came to public attention due to major environmental harm it caused. [2] [3]