天津市第四建筑工程公司广大职工,坚持党的基本路线,以大庆工人阶级为榜样,发扬“自力更生”、“艰苦奋斗”的革命精神,大搞技术革新的群众运动,在学习兄弟单位先进经验的基础上,结合天津地区施工条件经过反复试验,试制出了2吨轻型塔式起重机,自己武装了自己。一、技术性能2吨轻型塔式起重机的技术性能见表1。二、特点和效果 The employees of Tianjin No. 4 Construction Engineering Company adhered to the Party’s basic line, followed the example of the Daqing working class, carried forward the revolutionary spirit of “self-reliance” and “hard work” and vigorously engaged in the mass movement of technological innovation, learning from the advanced experience of the fraternal units. On the basis of this, combined with the repeated trials of the construction conditions in Tianjin, a two-ton light tower crane was trial-produced and he himself was armed. First, the technical performance of 2 tons of light tower crane technical performance in Table 1. Second, characteristics and effects