Boart Longyear samples for the proposed Golden Gate Bridge in San Francisco. In spite of the financial crisis, the 1930s saw improvements in diamond drilling technology, including the use of industrial-quality diamonds mined in Africa that were called “boarts.” In 1936, South Africa’s Anglo American Corporation formed Boart Products South Africa (Pty) Limited, which was later named Boart International. The new company developed the first mechanically-set diamond core bits, which were less expensive than the hand-set core bits that used more expensive Brazilian diamonds (carbonados). Longyear’s business gradually improved in the 1940s in response to expanding worldwide mineral exploration. In 1949, the
Industrial shredder shredder as they can shred paper as well as wood, plastic, metal including a whole car depending on the size and design of the industrial shredder. The industrial shredder is commonly used to process materials into different sizes for separation or to reduce the recycling cost of transport but a primary use is the upgrading of the material by shredding metals, plastics, aluminium, metal and cars and as well as waste materials such as municipal solid waste or nuclear waste, medical waste, hazardous waste including common garbage. An industrial shredder is any shredder that can be used in an industrial