Two types of hydraulic fluids currently being used in civil aircraft are
a) MIL-H-83282 and Skydrol 500 B
b) MIL-H-5606 and MIL-H-7644
c) MIL-H-83282 and MIL-H-7644
d) Skydrol 500 B and MIL-H-5606

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