Explosion-proof coal-cutting equipments approved prior to Jan. 1, 1923 (supplementary to Bulletin 78).

Bibliographic Details

Corporate Author:	United States. Bureau of Mines
Format:	Government Document eBook
Language:	English
Published:	[Washington] : [publisher not identified], 1923.
Series:	Mines Bur. Rpt. of Investigation No. 2481
Subjects:	Coal. Machinery industry. Electronic books.
Online Access:	Connect to the full text of this electronic document