This difference is one of the key question in the design of the external insulation.
这种差异一直是电力系统外绝缘设计的关键问题之一。
Understanding the difference can help us to grasp the key point in heat insulation design.
了解这些差异有助于在设计时把握主要问题。
Understanding the difference can help us to grasp the key point in heat insulation design.
了解这些差异有助于在设计时把握主要问题。
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