945
Then , in-plane , coupling , and bending stiffness matrices can be obtained by , respectively where z represents the vertical position in the ply from the midplane .
 manufacturing process: bending; material: be; concept or principle: vertical; concept or principle: midplane
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:
 manufacturing process: bending; material: be; concept or principle: vertical; concept or principle: midplane