"反向行程限位器" can be translated as "reverse stroke limiter" or "reverse travel limiter".
"Reverse stroke limiter" emphasizes limiting the stroke (movement distance) in the reverse direction.
"Reverse travel limiter" focuses on restricting the travel (movement) in the opposite direction.
Both expressions are commonly used in mechanical and engineering contexts to describe devices that prevent excessive movement in the reverse direction. Choose the one that best fits your specific application or technical documentation.