1. 2. smart phone 3. know the 4. never/think is a very interesting technologies. 5. Trust does not have (non-secure) 6. can be used in multiple formats, such as survey information, and safety. To take a picture or video in high angle and transport etc. 7. subject to the domestic spying of data areas. Make an easy terror. 8. better. 9. has the ease of use and deployment of a wide range of training courses with. 10. do not. Because it is a technology that is both productive and affects the country. It's important to spend time studying, well, first. In addition, there should be a law to the extent it comes to accommodate security to the country. 11. possible. 12. 13. should sufficiently high. Approx. 3-5 km may depend on the pattern of use of a train. 14. 15.
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