This disclosure relates to methods and systems for queuing traffic in packet-switched networks. A thickness of the protection device is determined by measuring between overlying points on overlying panels of the protection device at location where an occupant’s head having a given mass may contact the device. Radial flow swirlers are provided for creating a rotational movement of the combustion air in said annular chamber. The person handling the termination for the lessor then enters a termination fee, Ft, of either Rv, Bv, or an amount in between. The extended amount of resonance time allows for separation of pollutants, liter, and contaminated solids. A first cement dispersant includes a copolymer having a first constitutional unit derived from an unsaturated alkylene glycol ether monomer; and a second constitutional unit derived from an unsaturated monocarboxylic acid monomer, wherein the second constitutional unit includes at least one structure derived from an acrylic acid.