B2 not allowing water to go through防水的,不透水的
More examples
This coat isn't waterproof, but it is showerproof.
The material has been treated with resin to make it waterproof.
These are the electrical connectors, cased in waterproof plastic.
to put a special substance on the surface of something that will prevent water from going through it使…不透水;对…作防水处理
a coat or other piece of clothing that keeps you dry because it does not allow water in防水衣,防水服
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