down-draft furnace
81Casting defect — A casting defect is an irregularity in the metal casting process that is undesired. Some defects can be tolerated while others can be repaired otherwise they must be eliminated. They are broken down into five main categories: gas porosity,… …
82blast — [[t]blæst, blɑst[/t]] n. 1) a sudden and violent gust of wind 2) the blowing of a trumpet, whistle, etc 3) a loud, sudden sound or noise: a harsh blast from the radio[/ex] 4) a forcible stream of air from the mouth, bellows, or the like 5) mac a) …
Страницы
