本文介绍了接触式测厚仪和非接触式测厚仪的工作原理、特点、保养及预防性维护，同时对非接触式测厚仪的射线源也进行了阐述。
This paper introduces theory, characteristic, maintainer and preventability maintenance of contact and non-contact thickness gauge and ray source of that are described.
采用非接触式眼压计测量眼压，超声角膜测厚仪测量角膜中央厚度。
IOP reading was measured with noncontact tonometer; central corneal thickness were measured with ultrasonic corneal pachymeter.
采用非接触式眼压计测量眼压，超声角膜测厚仪测量角膜中央厚度。
IOP reading was measured with noncontact tonometer; central corneal thickness were measured with ultrasonic corneal pachymeter.
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