在国际展览会上,苏联展出了КБ系列的新型塔式起重机。这类起重机已在1963～1964年投入生产。整个系列由载荷力矩为4～250吨米八种主要型式的有轨起重机组成。起重机上有迴转塔身和起重臂(图1)。迴转-支承装置做成双列滚珠圆环的形式,它的拆卸和转移都无须拆成部件(图2)。上述起重机具有下列主要特点: At the international exhibition, the Soviet Union exhibited the new tower cranes of the КБ series. Such cranes have been put into production in 1963 ~ 1964. The entire series consists of eight main types of rail cranes with a load torque of 4 to 250 tons. The crane has a slewing tower and a boom (Figure 1). Swivel - The supporting device is made in the form of a double-row ball circle without the need to disassemble and disassemble it (Figure 2). The above crane has the following main features: