| 摘要 |
A watch crystal is sealed into a watch by means of an annular gasket of a relatively hard material such as a synthetic resin or soft metal. The parts comprising the seal are so dimensioned that the crystal seats in the gasket in an interference fit and the gasket fits in the case body in an interference fit. Such gaskets, while providing an effective seal even when subjected to high pressure, have long life, and hold the crystal sufficiently strongly so that a bezel is not needed.
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