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Frederick, 美国 中的 商业制造与供应
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Rad Electric develops, manufactures and markets a commercial electric ion chamber system that sells under the brand name E-PERM.

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常见问题解答

问:
What exactly is an E-PERM®? How is it different from an electret?
答:
An E-PERM®® is comprised of two components: (1) an electret, and (2) a special chamber that will allow ionization to occur....
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