The weather turns cold, ask the students to pay attention to insulation.
天气转冷，请同学们注意保温。
What kind of valve should be heat or cold insulation, according to the production request.
什么样的阀门应该保温或保冷，要根据生产要求而定。
Fir tree branches make excellent insulation from the cold.
冷杉的树枝有良好的抗风寒性能。
Shall we start the testing of cold insulation resistance?
冷态绝缘电阻测试是否可以开始？
Shall we start the testing of cold insulation resistance?
冷态绝缘电阻测试是否可以开始？
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