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3 70年代 20世纪70年代是我国塔机行业迅猛发展的十年,产量快速增长,总产量达3 882台,是60年代总产量的10倍,历年产量见表3。 20世纪70年代塔机行业迅猛发展的另一特点是众多下回转快装塔机新产品相继涌现,如QT16、QT25(图6)、QT25HK、QT45、QT60等。向阳1-4型轮胎式塔
1970s The 1970s was a decade of rapid development of China’s tower crane industry with a rapid increase in output with a total output of 3882 units, which is 10 times of the total output in the 1960s. Table 3 shows the historical output. Another characteristic of the rapid development of the tower crane industry in the 1970s was the emergence of many new products under the slewing tower crane, such as QT16, QT25 (Figure 6), QT25HK, QT45 and QT60. Xiangyang 1-4-type tire tower