calcium to sulfur ratio

calcium to phosphorus ratio

Bypassing Air Ratio

bus utilizationcarrier to interference ratio

brix to acid ratio

boom length to suspension height ratio

book to bill ratio

bituminous coal ratio

bit energy to interference density ratio

birth weight to placental weight ratio

binder to water ratio

bilge-radius to beam ratio

bias air ratio

bearings ratio to press

Base-N to dress-N ratio

ball to powder weight ratio