| vapor |
ไอ |
| vaporization |
การกลายเป็นไอ, ระเหย |
| variation |
การแปรผัน |
| A Coatings |
(English) Coatings on hot-dipped galvanized steels processed to convert the coating completely to zinc-iron alloys; dull gray in appearance, have no spangle, and after proper preparation, are well suited for painting.
|
| A Elevation |
(English) The top level of the boiler firebox where four oil guns are located. The oil guns are used to produce steam and maintain pressure while the boiler is on oil fire. |
| ABSOLUTE PRESSURE |
(english) The indicated value of the weight of the earth's atmosphere. At sea level, this value is approximately 14.65 psi (pounds per square inch). |
| Activation |
(english) The changing of the passive surface of a metal to a chemically active state. Contrast with passivation. |
| Adapti Investment Casting Process |
(english) A lost wax process employing one of three methods; centrifugal, vacuum or gravity-pouring casting. |
| AFS Tests |
(english) A number of standard tests determined by American Foundrymen's Society to evaluate molding and core sands. |
| Age Hardening |
(english) Hardening by aging, usually after rapid cooling or cold working. The term as applied to soft, or low carbon steels, relates to a wide variety of commercially important, slow, gradual changes that take place in properties of steels after the final treatment. These changes, which bring about a condition of increased hardness, elastic limit, and tensile strength with a consequent loss in ductility, occur during the period in which the steel is at normal temperatures. |
