MT/T 521-2025 PDF English
| Std ID | Version | USD | Buy | Deliver [PDF] in | Title (Description) |
| MT/T 521-2025 | English | 589 | Add to Cart | 4 days [Need to translate] | (Standard drill rod for drilling in underground coal mine) |
| MT/T 521-2006 | English | 299 | Add to Cart | 3 days [Need to translate] | Standard drill rod for drilling in coal mine gallery |
| MT/T 521-1995 | English | 319 | Add to Cart | 3 days [Need to translate] | (Conventional coal mine tunnel drill geological drilling) |
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Basic data
| Standard ID | MT/T 521-2025 (MT/T521-2025) |
| Description (Translated English) | (Standard drill rod for drilling in underground coal mine) |
| Sector / Industry | Coal Industry Standard (Recommended) |
| Word Count Estimation | 25,298 |
| Date of Issue | 2025-06-30 |
| Date of Implementation | 2025-12-30 |
| Older Standard (superseded by this standard) | MT/T 521-2006 |
| Issuing agency(ies) | National Energy Administration |
