893
Preventive actions implemented by the company reduced the workers ' metal exposure despite unchanged emissions of particles , indicating a need for careful design and regulation of the AM environments .
 application: company; material: metal; concept or principle: exposure; concept or principle: particles; engineering feature: design; 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:
 application: company; material: metal; concept or principle: exposure; concept or principle: particles; engineering feature: design; manufacturing process: AM