1926年的劳力士，发明了“锁底，锁把，锁圈”的优秀防水结构。整体采用钢材车削而成。由于正面的玻璃和背面的后盖都是鼓起的，（也叫泡泡背）样子很象海里的蚝，又有蚝的坚固特征，所以以蚝式命名。现代的劳力士，上圈由锁紧改压式结构，玻璃和后盖也由鼓变平，但坚固防水的特征依然没有改变。所以依然延续这个叫法。
French戴了10年的蚝式劳最近误入洗衣机，经历了预洗、90华氏度温水洗涤、漂洗、甩干、热风烘干全过程。
My ten-year-old Oyster was inadvertently placed in the washing machine recently and was duly prewashed, washed at 90 degrees, rinsed, spun and tumbled dry.
早在1971年年初，劳力士潜艇，劳力士蚝式恒动海2000年，已成为城市居民的极少数手表一个能海下生存，在极端条件下的压力。
As early as 1971, the Rolex submariner, the Rolex Oyster Perpetual sea Dweller 2000 has become one of the very few watches that could survive pressures in extreme conditions under the sea.
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