2Q==-1
2016 , Düsseldorf, Germany , 4 April - 8 April ,2016
9k=
TUBO TECH 2013 Sao Paulo Brazil ,1 Oct - 3 Oct ,2013
2Q==-1
2012 , Düsseldorf, Germany , 23 March - 30 March ,2012
2Q==-1
Tube 2008 ,Düsseldorf, Germany 31 March - 4 April ,2008Tube
2Q==
OTC 2008, Houston, Texas, USA 5—8 May, 2008
9k=-1
Steel World Conference & Exhibition Maastricht, the Netherlands, 6-8 November 2007