There are two main classes of solids: crystalline and amorphous.
Thus, there are four main classes of covering.
Two main classes of figurative language, Pope argued, were responsible: "the Magnifying" and "the Diminishing".
What's more, the two main classes of debt carry interest rates of 8.75% and 12.25%.
The two main classes of reamers are machine, or chucking, reamers and hand reamers.
There are two main classes of annuities: annuities certain and contingent annuities.
The five main classes of antibodies (immunoglobulins): IgG, IgA, IgD, IgE, and IgM.
There are two main classes of fireworks: force-and-spark and flame.
There are three main classes of methods that are used for the study of electronic structure.
Along with proteins and carbohydrates, the glyceride oils and fats constitute the three main classes of food.
The main classes of phosphorus based MMP inhibitors are: bisphosphonates, phosphonamidates, phosphinamidates, phosphinates, phosphonates and carbamoylphosphonates.
