This paper introduces theory, characteristic, maintainer and preventability maintenance of contact and non-contact thickness gauge and ray source of that are described.
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。
The pressure gauge core uses non-contact structure, with the advantages of simple structure, high sensitivity, good reliability and long service life;
本压力表表芯采用无触点结构，具有结构简单、灵敏度高、可靠性好和 使用寿命长等优点；
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