久久精品麻豆,精品国产一区二区三区不卡蜜臂,松下纱荣子在线观看,欧美日韩亚洲高清

Waterproof joints have good sealing, good waterproof and strict dust proof. Experiments have been done to keep the joints under water more than 10 meters for about two weeks, so that they can work continuously in these two weeks and destroy them continuously for up to 12 hours. After being taken out of the water again for such a long time, it was found that, as before, it was not seriously damaged enough to see good performance.

Above is about the waterproof joint of the most basic knowledge, it is the most basic waterproof tools, also the best performance of waterproof appliances, we can consider when buying waterproof appliances.