Braked mass. Контекст:
The railway presenting the brake for acceptance must also provide full information on the characteristics of these vehicles and locomotives, such as tare, load, braking, braked mass, brake changeover mass, coupler equipment, buffing and drawgear equipment, type of driver's control valve, power of compressors, reservoir capacities, etc.

Volumetric brake capacities. Контекст:
The volumetric brake capacities having been filled, the supply from the main brake pipe will be cut between the locomotive and the first vehicle.

Заранее спасибо!

volumetric brake capacities - объемы тормозных резервуаров

brake changeover mass - весовые установки пневмотормоза (порожний/средний/груженый). Прим.: такая система в РФ не применяется.