在毛主席革命路线指引下,我国各条战线形势大好,解放以来兴建了许多工矿企业。在“土洋并举”、“大中小并举”等一整套两条腿走路的方针指引下,必将有更多的中小型工厂投入生产,而一些小型机械厂就常遇到小吨位的吊车梁。目前对于大吨位的吊车梁研究较多,而对于小吨位的吊车梁(特别是三吨以下的吊车梁)选型问题研究较少,对于小吨位吊车梁用什么型式这里也有一个路线问题,有人说:“小吨位吊车梁因为小,没有什么搞头, Guided by Chairman Mao’s revolutionary line, the situation in various fronts of our country has been in a very good situation. Since the liberation, many industrial and mining enterprises have been established. Under the guidance of a set of two-legged walk with the principle of “bringing the two countries together,” “making the middle, small and large”, more and more small and medium-sized factories will surely go into production. However, some small-sized machinery factories often encounter small tonnage crane beams . At present, there are many researches on large-tonnage crane girder, while there are few researches on the selection of small tonnage crane girders (especially those under three tons). There is also a route problem for the small tonnage crane girder. Said: "small tonnage crane beam because of small, nothing come out,