How can I make a good company Introduction letter (B2B), for a HR outsourcing company?

The following sites may be of use to you concerning writing letters of introduction:

Introduction letter - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Introduction_letter)

Idea Cafe Small Business Archive: "Company introduction letter" (http://www.businessownersideacafe.com/cyberschmooz/marketingmix/3612.html)

cover letters - sales introduction letters and inventions ideas submissions (http://www.businessballs.com/introletters.htm)

Introduction Letter... The key business letter for getting your foot in the door (http://www.writinghelp-central.com/introduction-letter.html)

Welcome to ASP web site - introduction letter (http://www.asprotection.com.au/introduction.htm)

Hai Dear,
Please arange one sample Plastic company Introduction letter sample

We have injuction moulding and also we have 15 years experience in this field

We have injuction moulding and also we have 15 years experience in this field