1168
As the wire feeding speed increases , the transfer mode of the droplet gradually changes from the free transfer mode to the bridging transfer mode .
 material: As; process parameter: wire feeding; concept or principle: droplet; concept or principle: bridging
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:
 material: As; process parameter: wire feeding; concept or principle: droplet; concept or principle: bridging