"电阻丝应变仪" can be translated as "resistive wire strain gauge" or "wire resistance strain gauge".
“resistive wire” emphasizes the resistive property of the wire used in the strain gauge.
“wire resistance” directly points out the resistance characteristic of the wire in the context of measuring strain.
Both expressions are commonly used in the field of engineering and instrumentation to refer to this type of device that measures strain by detecting changes in the electrical resistance of a wire.