| burlap | ผ้ากระสอบ |
| burring | ครีบ, บั้ง |
| bush hammering | เครื่องกระเทาะผิว |
| butt joint | รอยต่อชน |
| butt weld | รอยเชื่อมต่อชน |
| 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. |
| 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. |
| BA | (english) Batch Anneal |
| Babbitt | (english) An antifriction metal alloy used for bearing inserts;made of tin,antimony,lead and copper. |
| Back Draft | (english) Reverse taper which would prevent removal of a pattern from a mold or a core from a corebox. |