若环境温度低于冰点，应预先向泵内通入热蒸汽，进行预热处理，然后才可启动齿轮泵。
If the environment temperature is below freezing, should advance to pump into the hot steam, preheating treatment, and then to start the pump.
若环境温度低于冰点，应预先向泵内通入热蒸汽，进行预热处理，然后才可启动齿轮泵。
If the environment temperature is below freezing, should advance to pump into the hot steam, preheating treatment, and then to start the pump.
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