潘荫琦等同志在水城队对U形钎头阶梯形钎头进行了多次试验，并取得了良好的成绩。在地质部生产技术、机械会议上，水城队张继武同志向与会山地工作代表介绍了该队U形钎头的试验效果。但这种形式的钎头仅在水城队进行了初步试验，因此，在不同条件下如何使用尚需进一步研究试验。现将“U形钎头的试验”一文发表以供参考。 Pan Yinqi and other comrades conducted many tests on the U-shaped brazing head stepped brazing heads in the Shuicheng Team and achieved good results. At the Department of Geology’s production technology and machinery meeting, Comrade Zhang Jiju of Shuicheng Army introduced the test results of the U-shaped drill bit to the participating mountain representatives. However, this form of bit is only preliminary test carried out in Shuicheng team, so how to use under different conditions still need further study. Now “U-shaped test bit” article published for reference.