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If the fiber length is equal to L and uniform , fiber orientation factor is equal to 1 and fiber length factor is given by the critical fiber length , r f is fiber radius , and i is interfacial shear stress between matrix and fibers .
 concept or principle: fiber length; engineering feature: fiber orientation; engineering feature: fiber length factor; machanical property: critical fiber length; manufacturing process: f; engineering feature: fiber radius; machanical property: interfacial shear stress; material: fibers
Please list all entity words in the text that fit the category.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} 
Answer:
 concept or principle: fiber length; engineering feature: fiber orientation; engineering feature: fiber length factor; machanical property: critical fiber length; manufacturing process: f; engineering feature: fiber radius; machanical property: interfacial shear stress; material: fibers