The circumferential normal stress is tensile. 周向正應力是張性的。
The circumferential strains at the outer surface of the model are measured with strain gages after the tubes are pulled out of the model. 應用電阻應變片測量了換熱管從單管模型中拉出后該模型外表面的周向應變，并根據彈性理論從周向應變計算出殘余接觸壓力的實(shí)驗值。
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