2029
On the other hand , internal complexity and small features are limited in this process , since with constant preheating of each layer to a high temperature , the powder is partially sintered and later can not be removed from the manufactured part .
 concept or principle: complexity; concept or principle: process; manufacturing process: preheating; process parameter: layer; process parameter: temperature; material: powder; manufacturing process: sintered; material: be; concept or principle: manufactured
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: complexity; concept or principle: process; manufacturing process: preheating; process parameter: layer; process parameter: temperature; material: powder; manufacturing process: sintered; material: be; concept or principle: manufactured