Spark plug heat dispersal. The heat that the electrode section of the spark plug receives due to combustion is dispersed through the path in the figure. The degree to which a spark plug disperses the heat it receives is called its heat range.
Inventory or stock refers to the goods and materials that a business holds for the ultimate purpose of resale (or repair). Inventory management is a science primarily about specifying the shape and placement of stocked goods. It is required at different locations within a facility or within many locations of a supply network to precede the regular and planned course of production and stock of materials.
a supply of goods kept on hand for sale to customers by a merchant, distributor, manufacturer, etc.; inventory. 2. a quantity of something accumulated, as for future use: a stock of provisions.