《技术市场》报简要介绍了122厂的“新型抛光产品——砂毡、砂毡轮”、“砂轮机除尘器”,212厂的“弱磁场测量仪”后,不到一个月就收到全国各地近三十封来信,要求学习,购置采用这些新技术新设备。唐山轻工机械厂来信说:长期以来,他们一直苦于磁场梯度测量这一问题,它直接关系到设备的技术性能,以致影响许多工作的进展,见到报载弱磁场测量仪的消息,我们欣喜万分……。马鞍山矿山研究院的来信说我们是搞选矿的,磁选是一种,但涉及许多磁性的测 The “Technology Market” report briefly introduced the “new type of polishing products—sand felt, sand felt wheel”, “grit dust remover” of No. 122 factory, and the weak magnetic field measuring instrument of No. 212 factory received in less than a month. Nearly 30 letters from all over the country asked to learn and purchase new technologies and equipment. Tangshan Light Industry Machinery Factory wrote and said: For a long time, they have been suffering from the problem of magnetic field gradient measurement. It is directly related to the technical performance of the equipment, which has affected the progress of many tasks. We have seen news of weak magnetic field measuring instruments. We are pleased. extremely……. The letter from the Ma’anshan Institute of Mines says that we are engaged in beneficiation. Magnetic separation is a kind of method, but it involves many magnetic measurements.