Acknowledgement.The invention of the project in this edition. Accomplished with kindness. Help as well as director of Ubon Ratchathani Polytechnic College The vice director, teacher, and all slow Onyx degree that approve approval in the lower artificial generation and support. The teacher prize, the ong, support the book and report preparation artifact generation new teacher somnuk suwanprateep teachers nut organization thousand gold. And teachers rights Pong merit drama academic counselor. As well as experts and teachers in mechanical field all advice and opinions of the work. Capital operation and received support from the Polytechnic College of Ubon Ratchathani. So thanks to all supported functions. Encourage research and invention of new designers as well as teachers always noppawan. Amen. For the treatment of formatting for academic work. Even the people that was accomplished well. And the good arising from this study author give unto the father, mother, teachers, professors, and benefactor, gentlemen.
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