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Standard
| GB/T 34839-2017 Timekeeping instruments-Designs and dimensions of crowns and sealed tubes (English Version) |
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Detail of GB/T 34839-2017
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Introduction of GB/T 34839-2017
本标准规定了柄头和密封管的设计和尺寸及其公差。
本标准适用于有防水设计的机械、电机械和电子手表的柄头和密封管。
Contents of GB/T 34839-2017