做电气安装工作,要数安装配电盘的工种最吃累。操作手拿钢凿和小锤,一下又一下的在砖墙面上凿孔开穴,然后往墙洞嵌进木料,再钉上所需的配电盘,劳动强度很大。在不久前一种安全可靠,操作简便的高强度水泥钢钉,试制成功并投入生产。这是在中国科学院金属研究所的协助下由上海南汇县彭 To do electrical installation work, it is necessary to count the number of jobs for installing switchboards. With steel chisels and hammers in hand, drill a hole in the brick wall again and again, then insert the wood into the wall hole, and then nail the required switchboard. The labor intensity is great. In the recent past, a kind of high-strength cement nail which is safe, reliable and easy to operate has been successfully tested and put into production. This is under the assistance of the Institute of Metal Research of the Chinese Academy of Sciences from Shanghai Nanhui County Peng