1 सितंबर 2010
- 12:2512:25, 1 सितंबर 2010 अन्तर इतिहास +16 ऊष्मा विनिमायक →बाह्य लिंक: Fomer URL at www.hrs-spiratube.com does not work anymore. The same content is now being served from www.hrs-heatexchangers.com
- 12:2112:21, 1 सितंबर 2010 अन्तर इतिहास +5 ऊष्मा अन्तरण →बाहरी लिंक: Fomer URL at www.hrs-spiratube.com does not work anymore. The same content is now being served from www.hrs-heatexchangers.com