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爬升高度超过244m一家加拿大塔式起重机公司安装了3台大型动臂塔机,其中2台使用了长度超过18m的附墙撑杆,能够爬升到244m的高度。
Climbing height of more than 244m A Canadian tower crane company installed three large boom tower machines, two of which used wall-mounted stays of more than 18m in length, capable of climbing to a height of 244m.