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The video tells the theory of the thoery of collimating and focus lens, functions of collimating lens and focus lens of fiber laser cutting and issues and solutions of them.
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00:00-01:04 Brief
01:05-03:28 Theory
03:29-07:20 Functions
07-20-11:10 Issues and Solutions
11:10-13:20 Check Ways
13:20-13:55 End