Thank you GwachAquarian. 

Any specific suggestion (name of some recruiters of CAT, Deere etc. ) or technique for job haunt in this area or place with more jobs for mechanical engineers (with F-1) visa,  from you or anybody else would make me feel more comfortable.  

Thanks  to OcRam (Mr. M.A) for your investigation too. 

Your suggestion as PM or in common will be highly appreciated.