| Adapti Investment Casting Process | (english) A lost wax process employing one of three methods; centrifugal, vacuum or gravity-pouring casting. |
| Aging 2 | (english) A change in properties that occurs at ambient or moderately elevated temperatures after hot working or a heat treating operation (quench aging in ferrous alloys), or after a cold working operation (strain aging). The change in properties is often, but not always, due to a phase change (precipitation), but does not involve a change in chemical composition. In a metal or alloy, a change in properties that generally occurs slowly at room temperature and more rapidly at higher temperatures. |
| AIR BLEEDER AUTOMATIC | (english) A valve that is fit into a hydraulic pipeline to facilitate automatic release of air trapped in the pipeline. See also AIR BLEEDER, MANUAL. |
| Ball Piston Pumps | (english) The Ball Piston Pump is a very simple pump design. It has a rotor which revolves around an internal stator. The rotor has twelve cylinders machined out of it, and each cylinder has a ball inside which can slide in and out of the cylinder. |
| ภาคีวิศวกร (ชาวบ้าน) | First level (engineer) - บริษัทฝรั่งเรียก |
| สามัญวิศวกร (ชาวบ้าน) | Second level (engineer) - บริษัทฝรั่งเรียก |
| วุฒิวิศวกร (ชาวบ้าน) | Third level (engineer) - บริษัทฝรั่งเรียก |
| B Elevation | (english) The bottom level of the boiler firebox where two oil guns are located. The oil guns are used if the boiler needs extra steam while on oil fire. |
| Back Draft | (english) Reverse taper which would prevent removal of a pattern from a mold or a core from a corebox. |
| Back Gears | (english) Gears fitted to a machine to increase the number of spindle speeds obtainable with a cone or step pulley belt drive. |