14 by 80 nanometres in 14×80么?

14 by 80 nanometres in 14×80么? 英语长难句成分,下面句子的主干?主语及谓语各是什么?The first they dealt with by coating the top of the device with oxides of hafnium,molybdenum and titanium,in layers about 100 nanometres thick他们在设备顶上盖上了大概 by by by by by by by by by by by by “by”这个词有几种解释?by by by by MTR和by story by,written by by used by