| # | Regulations |
|---|---|
| 1 | - - Initiation of explosive charges - electric blasting. |
| # | Letters of Interpretation |
|---|---|
| 1 | - 1926.906(q) - Carbon zinc batteries in blasting galvanometers. |
| # | Regulations |
|---|---|
| 1 | - - Initiation of explosive charges - electric blasting. |
| # | Letters of Interpretation |
|---|---|
| 1 | - 1926.906(q) - Carbon zinc batteries in blasting galvanometers. |