Mine Safety Board decision 28 : Safety catches and arresting devices for cages, skips, and cars in mine shafts and slopes.
| Corporate Author: | |
|---|---|
| Format: | Government Document eBook |
| Language: | English |
| Published: |
[Washington] :
[s.n.],
1938.
|
| Subjects: | |
| Online Access: | Electronic resource (PDF) |
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