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本文主要介绍JG比较式镜度检具的原理及使用方法,并将其性能与其它眼镜片检查仪器进行比较,同时阐述本检具使用方便、精度可靠等特点。
This article mainly introduces the principle and usage of JG comparative speculum gage, compares its performance with other ophthalmic lens inspection instruments, at the same time expounds the characteristics of the gage is easy to use and reliable.