2109
The rotating scanning strategy using hd of 0.5 mm resulted in stochastic , foam-like structures , both with open and closed pores and porosity values of 43Collins investigated the use and production of a permeable membrane heatsink produced by AM .
 concept or principle: scanning strategy; manufacturing process: mm; concept or principle: stochastic; concept or principle: foam-like structures; machanical property: pores; machanical property: porosity; manufacturing process: production; biomedical: permeable membrane; manufacturing process: AM
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: scanning strategy; manufacturing process: mm; concept or principle: stochastic; concept or principle: foam-like structures; machanical property: pores; machanical property: porosity; manufacturing process: production; biomedical: permeable membrane; manufacturing process: AM