§ 33.22 - Mode of use.  


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  • § 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.