6772
The growth of the long columnar grains into the top layer is inhibited if the penetration depth during the remelting of a previous layer is less than the depth of the equiaxed grains .
 machanical property: columnar grains; process parameter: layer; process parameter: penetration depth; process parameter: layer; concept or principle: equiaxed grains
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: columnar grains, layer, penetration depth, layer, equiaxed grains 
Answer:
 machanical property: columnar grains; process parameter: layer; process parameter: penetration depth; process parameter: layer; concept or principle: equiaxed grains