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Code · CFR · Title 30 — Mineral Resources · Part 57 · § 57.20032

§ 57.20032. Two-way communication equipment for underground operations.

22 words·~1 min read·/us/cfr/t30/s§ 57.20032·

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Telephones or other two-way communication equipment with instructions for their use shall be provided for communication from underground operations to the surface.
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