Metal and Nonmetal Mine Rescue Mine Map Legend Exam I
Taken from the 2016 Mine Rescue Contest Rules

Progress Indicator:
Question 1 of 20

1.  Identify this symbol:
Identify this symbol

Choices:
  1. Double Walled Stopping
  2. Seal
  3. Triple-Thick Check Curtain
  4. Permanent Stopping Intact

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