طن: الفرق بين النسختين

 

وهو مشتق من كلمة ''[[تن (حجم)|تن]]'' وهو مصطلح يُطلق على برميل كبير الحجم. ويمكن أن يحتوي هذا البرميل على مقدار يتراوح بين 210 و256 [[غالونًا]] (من 800 إلى 1000 لتر)، وهو ما قد يزن حوالي 2000 [[رطل (كتلة|رطل]] (900 كجم) ويشغل مساحة تبلغ 60 قدمًا مكعبة (1.7 متر مكعب) تقريبًا.<ref name=BTS.GOV>{{cite web |url=http://ntl.bts.gov/DOCS/narmain/narmain.html |title=Naval Architecture for All |publisher=United States Bureau of Transportation Statistics |accessdate=October 13, 2008}}. "Historically, a very important and standard cargo for European sailing vessels was wine, stored and shipped in casks called tuns. These tuns of wine, because of their uniform size and their universal demand, became a standard by which a ship's capacity could be measured. A tun of wine weighed approximately 2,240 pounds, and occupied nearly 60 cubic feet." ([[Thomas C. Gillmer|Gillmer, Thomas]] (1975). ''Modern Ship Design''. United States Naval Institute.) "Today the ship designers standard of weight is the long ton which is equal to 2,240 pounds."</ref>