[Code of Federal Regulations]
[Title 30, Volume 1]
[Revised as of July 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 30CFR33.22]

[Page 157]
 
                       TITLE 30--MINERAL RESOURCES
 
  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
 
PART 33--DUST COLLECTORS FOR USE IN CONNECTION WITH ROCK DRILLING IN COAL MINES--Table of Contents
 
                 Subpart B--Dust-Collector Requirements
 
Sec. 33.22  Mode of use.

    (a) A unit or system may be designed for use in connection with 
percussion and/or rotary drilling in any combination of the following 
drilling positions: (1) Vertically upward, (2) upward at angles to the 
vertical, (3) horizontally, and (4) downward.
    (b) Dust-collector units may be designed for use with specific 
drilling equipment or at specific drilling speeds.