THDFThreaded Female (piping)
THDFTransformer Harmonic Derating Factor
References in periodicals archive ?
Developed by THDF in 2009, the Sustainable Cities Institute provides a one-stop shop for cities and sustainability professionals to find vetted best practices from across the country to help them identify and implement local sustainability programs and policies, as well as communicate with other cities about related issues and topics.
Since 2009, NLC's work on sustainability--including a series of topical guides, case studies and a national survey--has been largely supported through THDF as NLC's official Sustainability Partner.
Going forward, NLC and THDF will finalize details of the transition, which is expected to take place in early 2012.