3420
When making a lattice structure by EBM , a certain size of the powder-removing hole is required to remove the sintered remaining metal powder from the lattice .
 engineering feature: lattice structure; manufacturing process: EBM; manufacturing process: sintered; material: metal powder; concept or principle: lattice
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: lattice structure, EBM, sintered, metal powder, lattice 
Answer:
 engineering feature: lattice structure; manufacturing process: EBM; manufacturing process: sintered; material: metal powder; concept or principle: lattice