石油计分六支组，九支组，单支的，测量范围0.650-1.010，六支组(0.650--0.710,0.710-0.770,0.770-0.830,0.830-0.890，0.890-0.950,0.950-1.010)，九支组(0.65-0.69,0.69-0.73,0.73-0.77,0.77-0.81,0.81-0.85,0.85-0.89,0.89-0.93,0.93-0.97,0.97-1.01),
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