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The electromechanical evaluation of the sandwiched MCF/SR sensors ( B-MCF/SR ) confirmed the high piezoresistive sensitivity of sensors ( gauge factor in order of ∼400 ) .
 concept or principle: electromechanical; machine or equipment: sandwiched MCF/SR sensors; machine or equipment: B-MCF/SR; machanical property: piezoresistive sensitivity; machine or equipment: sensors; machanical property: gauge factor
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
 Entities: electromechanical, sandwiched MCF/SR sensors, B-MCF/SR, piezoresistive sensitivity, sensors, gauge factor 
Answer:
 concept or principle: electromechanical; machine or equipment: sandwiched MCF/SR sensors; machine or equipment: B-MCF/SR; machanical property: piezoresistive sensitivity; machine or equipment: sensors; machanical property: gauge factor