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2. Weight plate - Wikipedia

   en.wikipedia.org/wiki/Weight_plate

   Plates can be weighed, and the equipment marked (using a paint pen or other permanent marker) with the true weight. [21] Calibrated plates are available from high-end manufacturers; many advertise these plates as being accurate to within 10 grams (0.02 lb) of marked weight, which is the tolerance mandated by the International Weightlifting ...

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4. 10-pounder Parrott rifle - Wikipedia

   en.wikipedia.org/wiki/10-pounder_Parrott_rifle

   Closeup photo shows the reinforcing band on the breech of the 10-pounder Parrott rifle. The 10-pounder Parrott rifle was a muzzle-loader. [12] It had a bore (caliber) with a diameter of 2.9 in (74 mm) and fired a projectile weighing 9.5 lb (4.3 kg). Its gun barrel was 74 in (188 cm) long and weighed about 890 lb (403.7 kg).

5. Weighing scale - Wikipedia

   en.wikipedia.org/wiki/Weighing_scale

   Balance scale set, with weights Scales used to measure the weight of fruit in a supermarket Weighing scale in use in Tokyo Digital kitchen scale, a strain gauge scale Weighing scale for a baby includes a ruler for height measurement. A scale or balance is a device used to measure weight or mass.

6. Calibration - Wikipedia

   en.wikipedia.org/wiki/Calibration

   The formal definition of calibration by the International Bureau of Weights and Measures (BIPM) is the following: "Operation that, under specified conditions, in a first step, establishes a relation between the quantity values with measurement uncertainties provided by measurement standards and corresponding indications with associated measurement uncertainties (of the calibrated instrument or ...

7. Triple beam balance - Wikipedia

   en.wikipedia.org/wiki/Triple_beam_balance

   Base - The base rests underneath the weighing pan and can usually be customized to fit on a workbench or set up with tripod legs. Beams - The three beams on the balance are used to set the level of precision, with each beam working at different increments (1-10 grams, 10 grams and 100 grams). When using the triple beam balance, it is ...

8. Avoirdupois - Wikipedia

   en.wikipedia.org/wiki/Avoirdupois

   The avoirdupois weight system is thought to have come into use in England around 1300. [citation needed] It was originally used for weighing wool. In the early 14th century several other specialized weight systems were used, including the weight system of the Hanseatic League with a 16-ounce pound of 7200 grains and an 8-ounce mark.

9. Steelyard balance - Wikipedia

   en.wikipedia.org/wiki/Steelyard_balance

   The two parts of the beam which flank the pivot are the arms. The arm from which the object to be weighed (the load) is hung is short and is located close to the pivot point. The other arm is longer, is graduated and incorporates a counterweight which can be moved along the arm until the two arms are balanced about the pivot, at which time the ...