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| International Standard Category: Steel profiles |
YB/T 157-1999 Hot-rolled sections for guide rails of lefts
电梯导轨用热轧型钢 ;
| Category No.: | 77.140.70 | Valid Status: | superseded |
| Issued Organization: | SBMI | Issued Date: | 1999-8-19 |
| Implemented Date: | 2000-1-1 | Abolished Date: | |
| Superseded Standard.: | YB/T 157-2022 |
Superseded Date: | 2023-4-1 |
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