Due to the particularity of retractable structure, design of this type of project must greatly differ from that of normal structure and be more difficult than the latter.
由于开合结构的特殊性决定这类工程的设计不同于常规结构，存在较大难度。
Due to the particularity of retractable structure, design of this type of project must greatly differ from that of normal structure and be more difficult than the latter.
由于开合结构的特殊性决定这类工程的设计不同于常规结构，存在较大难度。
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