Know-How Exchange : Other

Nitish,

Your question appears to be asking for help in finding databases. You can either purchase databases of customers like these:

https://www.infotdata.com/products/inbt.htm
https://www.consumermaillists.com/business-lists-c-1.html?osCsid=3905df224b...
https://www.specialdatabases.com/indiabusinessdatabase.html

These databases will have specific names of individuals and perhaps the one responsible for purchasing. University libraries and some local libraries have subscriptions to these services and you can go there to do your research - costs you time, but not so much money.

Or you can find online databases like this:
https://www.indiabusinesslist.com/

The ones you purchase are most likely more reliable. You can also use Google's local capability. For instance, if you are looking for road construction companies in New Delhi, search: Road Construction Company New Delhi. You will get address and phone number from these kinds of databases, but this won't get you the person's name who is responsible for purchasing surveying equipment, but if you are good at talking with people and have more time than money, you can talk your way to that person.

I hope this helps.

Wayde