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目前,我国塔式起重机(以下简称塔机)的在用量约20多万台,其中,租赁的在用塔机约10多万台,由于我国的塔机租赁业尚处于发展的初级阶
At present, the usage of tower cranes in China (hereinafter referred to as tower cranes) is about 200,000 units, of which about 100,000 units are being used for tower crane leasing. As China’s tower crane leasing industry is still at a preliminary stage of development