我曾在本刊1987年第1期发表了“提高工具寿命新途径”,沈阳119厂孙渝真同志也发表 DJB—823保护剂的应用,半年来,我和孙渝真同志都收到了数百封来信。读者对此项新工艺产生了浓厚的兴趣。为了满足广大读者的要求,现将使用工艺介绍如下;首先从北京邮电学院化学防护研究所购买823保护剂,此种材料系固体 I published a “New Way to Improve Tool Life” in the first issue of the journal, 1987. Comrade Sun Yuzhen of the Shenyang 119 Factory also published the application of DJB-823 protection agent. In the past six months, Comrade Sun and I have received hundreds of letters. The reader has developed a keen interest in this new process. In order to meet the requirements of a wide range of readers, the use of the process will now be described as follows; first buy 823 protective agent from the Beijing Institute of Chemical Protection, Institute of Posts and Telecommunications, this material is solid