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The heat dissipation condition in the molten pool of current layer tightly depends on the deposition direction of fore layer .
 concept or principle: heat dissipation; concept or principle: molten pool; process parameter: layer; process parameter: deposition direction; process parameter: layer
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: heat dissipation; concept or principle: molten pool; process parameter: layer; process parameter: deposition direction; process parameter: layer