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| 1. | " Tolerance and fitting, dimensions up to 500mm holes, shaft tolerance range and fitting" |
| GB/T1801-1979公差与配合尺寸至500mm孔、轴公差带与配合 |
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| 2. | output shaft rotation range |
| 输出轴转角范围 |
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| 3. | " Tolerance and fitting, dimensions up to 18mm holes, shaft tolerance range" |
| GB/T1803-1979公差与配合尺寸至18mm孔、轴公差带 |
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| 4. | " Tolerance and fitting, dimensions larger than 500mm and up to 3150mm ordinary holes,shaft tolerance |
| GB/T1802-1979公差与配合尺寸大于500至3150mm常用孔、轴公差带 |
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