主谓结构句子，主语they 谓语dealt with ，by 介词引导方式状语从句，意为：通过…手段，by 后面的动名词coating＋宾语the top of the device，with 后面的宾语补足语修饰the top of the device，最后in layers about 100 nanometres，介词“in”＋名词也构成宾语补足语，修饰the top…，希望对你有用～手机打字，望采纳
The first they dealt with by coating the top of the device with oxides of hafnium, molybdenum and titanium,主干。主语是他们，谓语是盖上。。。
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