8698
In this paper , we investigate experimentally the filament feeding force , as a function of the feeding rate , for different materials ( PLA and ABS ) , liquefier temperatures , nozzle diameters , and lengths of the liquefier .
 material: filament; concept or principle: force; material: as; concept or principle: materials; material: PLA; material: ABS; process parameter: temperatures; concept or principle: nozzle diameters
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: filament, force, as, materials, PLA, ABS, temperatures, nozzle diameters 
Answer:
 material: filament; concept or principle: force; material: as; concept or principle: materials; material: PLA; material: ABS; process parameter: temperatures; concept or principle: nozzle diameters