Tempering is after quenching parts to AC1 heated to a temperature below, proper insulation, heat treatment process of cooling to room temperature.
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proper insulation
适当的绝缘
以上为机器翻译结果，长、整句建议使用 人工翻译 。
When the phone is charged through a substandard or incompatible charger, the risks become greater, because of the possible lack of proper insulation in the charger.
但若手机通过劣质、不兼容的充电器充电，则很可能加大危险程度，因为充电器里缺少合适的绝缘材料。
youdao
Proper insulation must be taken after welding.
焊后采用适当的保温处理。
He had seen a lot of wine cellars where people didn't spend the money on a proper system or use the right insulation.
WSJ: Storing Wine: Cellar, Wine Refrigerator��or Garage?
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