Corresponding Author

Paper:	idn044
Name:	Kopec B.
Company:	ZDB a.s. (Iron Works and Wiremill)
Address:	Bezrucova 300 735 93 Bohumin
Country:	Czech Republic
Phone:	420-69-608-3008
Fax:	420-69-608-2873
Email:	kopec@seznam.cz