| A colorless, odorless gas, which is highly poisonous. CO is produced by incomplete combustion. It is absorbed by the bloodstream 400 times faster than oxygen. | |
| A path through which electricity flows before returning to its source. | |
| Spring steel rod wound into a coil that supports the vehicles weight while allowing suspension movement. | |
| Part that supports and reduces friction between a stationary moving part or two moving parts. |