2075
6.1 Internal geometry at macro level In classical part production , channels for the transportation of viscous media are manufactured using conventional subtractive production methods like drilling , thus resulting in straight channels with round cross section and sharp corners .
 engineering feature: Internal geometry; engineering feature: macro level; manufacturing process: classical part production; concept or principle: manufactured; manufacturing process: conventional subtractive production methods; manufacturing process: drilling; engineering feature: straight channels; engineering feature: round cross section
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:
 engineering feature: Internal geometry; engineering feature: macro level; manufacturing process: classical part production; concept or principle: manufactured; manufacturing process: conventional subtractive production methods; manufacturing process: drilling; engineering feature: straight channels; engineering feature: round cross section