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In arc welding based additive manufacturing , the surface topographies of deposited layer are more complex than conventional welding , therefore , the distribution of the electromagnetic force in molten pool , arc pressure , plasma shear stress and heat flux on molten pool surface are not the same as the conventional welding .
 manufacturing process: arc welding; manufacturing process: additive manufacturing; concept or principle: surface topographies; process characterization: deposited layer; manufacturing process: conventional welding; concept or principle: distribution; concept or principle: electromagnetic force; concept or principle: molten pool; process parameter: arc pressure; concept or principle: plasma; machanical property: stress; concept or principle: heat flux; concept or principle: molten pool; material: as; manufacturing process: conventional welding
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: arc welding, additive manufacturing, surface topographies, deposited layer, conventional welding, distribution, electromagnetic force, molten pool, arc pressure, plasma, stress, heat flux, molten pool, as, conventional welding 
Answer:
 manufacturing process: arc welding; manufacturing process: additive manufacturing; concept or principle: surface topographies; process characterization: deposited layer; manufacturing process: conventional welding; concept or principle: distribution; concept or principle: electromagnetic force; concept or principle: molten pool; process parameter: arc pressure; concept or principle: plasma; machanical property: stress; concept or principle: heat flux; concept or principle: molten pool; material: as; manufacturing process: conventional welding