The beginning of the amazing events at Krakatoa in 1883 date to May 20 when there were initial rumblings and venting from the volcano, which had been dormant for about 200 years.
A refinery margin is the revenue associated with refining petroleum, expressed as a value per volume (e.g. $/L), net of the cost of the crude oil input. The simplest refining
First meaning: Margins in business commerce. As a general term in business and commerce, margin refers to the difference between selling price and the seller's costs for the goods or services being sold, expressed as a percentage of selling price.