engineering - freebase-schema/freebase GitHub Wiki Engineering Commons This is engineering commons Types Here are the following types in Engineering Commons Electric current type Material Signal Modulation Mode Channel access method Valvetrain configuration Power plug standard type Piston configuration Piston engine Power plug standard Battery size cell variation Battery size Battery Engine cooling method Engine Engine designer Fuel delivery method Engine category Location with mains power Battery cell type Reaction engine Engine energy source Material Composition Battery shape format Mains power ⚠️ **GitHub.com Fallback** ⚠️