derrick tower gantry 人字起重机塔式起重台架
derrick k tower 起重吊塔
metal tower derrick 金属塔架
tower-shaped derrick 塔形井架
selection of tower derrick 塔式起重机选用
This paper introduces correct selection methods and base design scheme of automatic tower derrick in high and super high building construction.
介绍高层或超高层建筑施工在选择塔式起重机时的正确选用办法和自升式塔式起重机的基础设计方案选择。
Tower is the crucial part of derrick and directly affects the safety of it, so it is quite important to calculate the strength, rigidity and stability of the tower accurately.
塔架是钻塔的重要组成部分，它直接关系到钻塔的使用安全。塔架的强度、刚度和稳定性设计计算的准确性是十分重要的。
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