8504
Here , two new support geometry algorithms are proposed , which are particularly suitable for weak support materials : the shell technique , whereby the primary support material would collapse under its own weight and thus a second support material is used to create a containment shell ; the film technique , whereby a second support material is deposited as a thin film between the part and the primary support material .
 application: support; concept or principle: geometry algorithms; material: support materials; machine or equipment: shell; material: support material; process parameter: weight; material: support material; machine or equipment: shell; material: support material; material: as; material: support material
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: support, geometry algorithms, support materials, shell, support material, weight, support material, shell, support material, as, support material 
Answer:
 application: support; concept or principle: geometry algorithms; material: support materials; machine or equipment: shell; material: support material; process parameter: weight; material: support material; machine or equipment: shell; material: support material; material: as; material: support material