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| International Standard Category: Keys and keyways, splines |
GB/T 3478.6-2008 Straight cylindrical involute splines - Metric module side fit - Part 6: 30°pressure angle M and W values
圆柱直齿渐开线花键（米制模数 齿侧配合） 第6部分：30°压力角M值和W值 ;
| Category No.: | 21.120.30 | Valid Status: | valid |
| Issued Organization: | AQSIQ; SAC | Issued Date: | 2008-09-22 |
| Implemented Date: | 2009-5-1 | Abolished Date: | |
| Superseded Standard.: | Superseded Date: |
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