The core could be very, very rich in hydrogen (a water ingredient) or totally dry.
地核中可能有巨量的氢（水分子的一种组分）或者完全干燥。
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Core testing device - wet and dry bulb sensor.
核心检测元件-干湿球传感器。
应用推荐
模块上移
模块下移
不移动