Dry hydraulic system needs no heat preservation measures;
采用干式消火栓系统不需要保温；
Such measures as pipeline heat preservation and antifreeze increase are confined.
采取的管线保温，加防冰剂等措施受到一定限制。
On construction site, observation, back analysis and feedback analysis are done, the corresponding effective methods of construction and measures of heat preservation are put forward in time.
现场观测并现场反分析，由反演的结果进行反馈分析，且及时地提出有关有效的施工方法和温控措施的建议。
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