When transformation of parts of speech takes place, we should distinguish synchronism from diachronism, grammar from rhetoric anti fixity from temporariness.

摘转类，应当区分历和、语法和修辞学、固定的和临的。

This paper introduces the principles of the vibroplatform,provides some methods for the detection and diagnosis of the servo valve,and makes the field monitoring of the synchronism of vibroplatform.

对振动台的原理作了简,给出了伺服阀的检测诊断方法,并对振动台的同步进行了现场监测。