Final answer:
The positions of the ME-23 brake valve handle in order are Release, Service, Emergency.
Step-by-step explanation:
The positions of the ME-23 brake valve handle in their respective order, from left to right, are Release, Service, Emergency. The ME-23 brake valve handle is commonly used in the engineering field, specifically in the context of locomotive braking systems. In this case, the positions of the handle refer to the different braking modes that can be selected: Release, when the brakes are fully released; Service, for normal braking scenarios; and Emergency, for situations that require immediate and maximum braking force.