The pressure gradient at every experimental temperature decreases with increasing conduit diameter thus the LPTT can be lowered down in larger size pipelines.
测得不同温度下压力梯度均随管径增大而下降，故增大管径可以降低极限输油温度。
The pressure gradient at every experimental temperature decreases with increasing conduit diameter thus the LPTT can be lowered down in larger size pipelines.
测得不同温度下压力梯度均随管径增大而下降，故增大管径可以降低极限输油温度。
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