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- Technology4
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- Patents -- Great Britain3
- Algebra1
- Algebra -- Early works to 18001
- Arithmetic1
- Arithmetic -- Early works to 18001
- Candlemaking1
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- Magnetic fields -- Research -- United States1
- Mathematics1
- Mathematics -- Early works to 18001
- Sea control1
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- Textile industry -- Great Britain1
- World War, 1914-1918 -- Naval operations -- Submarine1