我校函授生学员刘节用,经过多年潜心研究,制成Go9B型教学用数珠计算器,并获得国家专利,专利号为90204348·x,该项专利在1991年《全国专利新技术新成果、军转民新成果交易会》上获得优秀奖。使用该计算器能使一般人对两位数的口算达到一口清,熟练后对多位数计算达到题出算完。 Liu Jiao, a student of Lecturer in our school, spent years devoting himself to researching and manufacturing Go9B teaching bead counting machine and obtained the national patent with the patent number of 90204348 · x. The patent was awarded in 1991, “New Achievements of Patents, New Technologies, Military transition to new trade fair ”won the award. The use of the calculator can make the average person on a two-digit port count to achieve a clear, proficient after the multi-digit calculation to solve the problem.