Keep the structure of each patch simple (single span surfacing) to assure they are easy to control!
保持结构简单，每个补丁(单跨堆焊)，以确保它们很容易控制！
Manual Single-beam crane is configured by crane span structure, cart driving device and manual monorail car and other major parts.
手动单梁起重机系由桥梁，大车传动机构，手动单轨行车等主要部分组成。
It is a super-shallow-berried single-span tunnel project. The New Austrian Tunneling Method is used in design of station, constant-section composite lining is employed for the station structure;
按新奥法原理进行设计，结构采用等截面复合式衬砌，施工采用双侧壁台阶组合法暗挖施工，工程设计难度大、施工风险高。
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