防止燃料过滤器在严寒条件下被累积的石蜡堵塞。
Prevents the fuel filter from becoming blocked with paraffin accumulation in severe cold.
蜡沉积会减少管道的有效内径，增大输送压力，降低管道的输送能力，增加清管频率，甚至造成蜡堵事故。
Wax deposits can lead to reduce effective inside diameter of the pipeline, increase transport pressure, reduce capacity of the pipeline, more frequent pigging requirement and even potential blockage.
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