遵照毛主席关于“我们必须打破常规,尽量采用先进技术,在一个不太长的历史时期内,把我国建设成为一个社会主义的现代化的强国”的指示,在深入学习无产阶级专政理论的热潮中,在全国大好形势的鼓舞下,我们继激光线垂仪(IGJ)试制成之后,又试制成了激光水准仪(2GJ型). In conformity with Chairman Mao’s directive on “We must break the routine, try to adopt advanced technology and build our country into a powerful modern socialist nation” within a not too long historical period, we must, in the midst of a craze to further study the theory of dictatorship of the proletariat Inspired by the good situation across the country, we made a prototype laser (2GJ) after the IGJ trial was made.