830
2.2 Laminated object manufacturing In LOM , which was developed by Helisys of Torrance , CA and shipped in 1991 , 3D parts are manufactured by cutting 2D crosB-sections with a laser or cutter and sequentially laminating the sheets .
 manufacturing process: Laminated object manufacturing; manufacturing process: LOM; engineering feature: Helisys of Torrance; material: CA; application: 3D parts; concept or principle: manufactured; manufacturing process: cutting; concept or principle: 2D; enabling technology: laser; material: sheets
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:
 manufacturing process: Laminated object manufacturing; manufacturing process: LOM; engineering feature: Helisys of Torrance; material: CA; application: 3D parts; concept or principle: manufactured; manufacturing process: cutting; concept or principle: 2D; enabling technology: laser; material: sheets