MSHA approved fan assemblies that incorporate pipe nipple extensions.

Bibliographic Details
Corporate Author:	United States. Mine Safety and Health Administration
Format:	Government Document Book
Language:	English
Published:	[Arlington, Va.] : [U.S. Dept. of Labor, Mine Safety and Health Administration], [2006]
Series:	Program information bulletin ; no. P06-06.
Subjects:	Mines and mineral resources > United States > Equipment and supplies.
Online Access:	https://purl.fdlp.gov/GPO/LPS93734

Description
Item Description:	Title from title screen (viewed on May 1, 2008). "3/30/06." Electronic resource.
Physical Description:	3 pages : digital, PDF file.
Format:	Mode of access: Internet from the MSHA web site. Address as of 05/01/08: http://www.msha.gov/regs/complian/pib/2006/pib06%2D06.pdf ; current access available via PURL.