7519
The layered structure inherently results in significant mechanical anisotropy in printed parts , causing the tensile strength in the build direction ( z-axis ) to be only a fraction of the in-plane strength – a decrease of 50–75 % is common .
 concept or principle: layered structure; machanical property: mechanical anisotropy; machanical property: tensile strength; process parameter: build direction; concept or principle: z-axis; material: be; concept or principle: fraction; machanical property: in-plane strength
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: layered structure, mechanical anisotropy, tensile strength, build direction, z-axis, be, fraction, in-plane strength 
Answer:
 concept or principle: layered structure; machanical property: mechanical anisotropy; machanical property: tensile strength; process parameter: build direction; concept or principle: z-axis; material: be; concept or principle: fraction; machanical property: in-plane strength