本刊1989年第1期刊出杨爱蝶同志的“JD型继电器的双响分析”(简称“双响”)一文后,收到了金贞贤等同志对“双响”一文的看法。对JD型继电器产生双响的机理他们的看法是一致的,但对双响现象是否可以避免及其对产品质量是有害还是有益却持有不同的看法。 据了解,JD型继电器的双响现象在目前的生产实践中是存在的,因此,弄清双响现象,对提高产品质量是有益的。故本刊又刊出以下4篇文章供读者参考。 The first issue of 1989 issue of Comrade Yang Aidi, “JD relay double ring analysis” (hereinafter referred to as “double ring”) one article, received Kim Jung Hyun and other comrades on the “double ring” article. They have a consistent view of the double-acting mechanism for relays of type JD, but hold different opinions on whether double ring phenomena can be avoided and whether they are harmful or beneficial to the quality of the product. It is understood that, JD-type double ring phenomenon in the current production practices exist, therefore, to clarify the double ring phenomenon, to improve product quality is beneficial. Therefore, we published the following four articles for readers reference.