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The process begins with the spreading of a layer of material over the build platform , typically 0.1 mm thick .
 concept or principle: process; process parameter: layer; material: material; machine or equipment: build platform; manufacturing process: mm
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: process; process parameter: layer; material: material; machine or equipment: build platform; manufacturing process: mm