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You searched for: Topical Subjects Coal miners. Remove constraint Topical Subjects: Coal miners. Topical Subjects Coalbed methane--Testing. Remove constraint Topical Subjects: Coalbed methane--Testing.
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A man stands in the mining shaft holding an instrument to test the gas levels in the mine.

1. Testing for Gas in a Pittsburgh Seam Coal Mine

IDNO:
001781
Title:
Testing for Gas in a Pittsburgh Seam Coal Mine
Description:
A man stands in the mining shaft holding an instrument to test the gas levels in the mine.