重心的确定是铁塔组立能否成功的关键之一。
The key to successful tower construction and erection is to determine the center of gravity .
其中重点介绍了杆塔组立施工和放线技术的研究。
Which focuses on the Tower Group Construction and Legislative Line technology.
其中重点介绍了杆塔组立施工和放线技术的研究。
Which focuses on the Tower Group Construction and Legislative Line technology.
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