one channel seismograph single-channel seismograph
Related Translations:
道地: 1.(真正是有名产地出产的) from the place noted for the product; genuine 短语和例子这是道地的东北人参。 this is the genuine ginseng from northeast.2.(正纯的) pure; typical 短语和例子说一口道地的英语 speak idiomatic english; 道地药材 ge