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  2. Grinding machine - Wikipedia

    en.wikipedia.org/wiki/Grinding_machine

    Rotating abrasive wheel on a bench grinder. Pedal-powered grinding machine, Russia, 1902. A grinding machine, often shortened to grinder, is any of various power tools or machine tools used for grinding.

  3. History of fertilizer - Wikipedia

    en.wikipedia.org/wiki/History_of_fertilizer

    Johann Friedrich Mayer (1719–1798) was the first to present to the world a series of experiments upon it the relation of gypsum to agriculture, and many chemists have followed him in the 19th century.

  4. Titanium - Wikipedia

    en.wikipedia.org/wiki/Titanium

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

  5. Methyl isobutyl ketone - Wikipedia

    en.wikipedia.org/wiki/Methyl_isobutyl_ketone

    At laboratory scale, MIBK can be produced via a three-step process using acetone as the starting material. Self-condensation, a type of aldol reaction, produces diacetone alcohol, [3] which readily dehydrates to give 4-methylpent-3-en-2-one (commonly, mesityl oxide). [4]

  6. Mercury (element) - Wikipedia

    en.wikipedia.org/wiki/Mercury_(element)

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  7. Tool - Wikipedia

    en.wikipedia.org/wiki/Tool

    Carpentry tools recovered from the wreck of the Mary Rose, a 16th-century sailing ship—from the top: a mallet, brace, and plane, the handles of a T-auger and gimlet, possibly the handle of a hammer, and a rule.

  8. Sodium hydroxide - Wikipedia

    en.wikipedia.org/wiki/Sodium_hydroxide

    Sodium hydroxide, also known as lye and caustic soda, [1] [2] is an inorganic compound with the formula NaOH.It is a white solid ionic compound consisting of sodium cations Na + and hydroxide anions OH −.

  9. Periodic table - Wikipedia

    en.wikipedia.org/wiki/Periodic_table

    The periodic table, also known as the periodic table of the elements, is an ordered arrangement of the chemical elements into rows ("periods") and columns ("groups"). It is an icon of chemistry and is widely used in physics and other sciences.

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