什么是整流电路？

A. 溶液的吸收度不得超过0.03
B. 目视检查未见浑浊
C. 溶液的澄清度相当于所用溶剂，或未超过0.5号浊度标准液
D. 溶液澄清度未超过1号浊度标准液

A. Visual inspection of the element
B. the pressure drop cross the filter
C. high fuel oil tank temperature
D. increase flow rate from the filter