| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/Z 3480.21-2025 | English | RFQ |
ASK
|
3 days [Need to translate]
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(Calculation of load capacity of spur and helical gears - Part 21: Calculation of scuffing load capacity - Integral temperature method)
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GB/Z 3480.21-2025
|