There are many people who think that a 30 meter waterproof watch is: waterproof up to 30 meters underwater, but not over 30 meters. In fact, this understanding is wrong, and it is this misunderstanding that leads many consumers to have their 30m waterproof watches go into the water when they do not reach the 30m underwater depth.In fact, a waterproof watch is a watch that has a certain amount of resistance to water pressure. The pressure resistance is not derived underwater, but is converted from the resistance to atmospheric pressure. This way the pressure test is static, not the watch can move underwater up to 30 meters. 30m water resistance is the minimum requirement for a waterproof watch, i.e. life water resistance, which only protects against occasional hand washing, splashing in the rain, and not even being worn in the shower.
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