4702
This method enables filling of the closed internal cavities to create planar and curved conductive 3D geometries without leaving pockets of trapped air that lead to defects .
 engineering feature: 3D geometries; material: lead; concept or principle: defects
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: 3D geometries, lead, defects 
Answer:
 engineering feature: 3D geometries; material: lead; concept or principle: defects