The letter L indicates the diving depth, in metres, guaranteed by the manufacturer.
字母L代表制造商保证的防水深度（单位：米）。
The meters value does not relate to a diving depth but to the air pressure used in the course of the water resistance test.
该米的价值并不涉及到潜水深度，但在空气压力的水阻试验过程中使用。
The metres value does not relate to a diving depth but to the air pressure used in the course of the water resistance test.
该米的价值并不涉及到潜水深度，但在空气压力的水阻试验过程中使用。
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