Required Minimum Distribution (RMD) The IRS requires that you withdraw at least a minimum amount - known as a Required Minimum Distribution - from some types of retirement accounts annually, starting the year you turn age 70-1/2. Determining how much you are required to withdraw is an important issue in retirement planning.
There are two types of seals: the earless, or true, seals (family Phocidae); and the eared seals (family Otariidae), which comprise the sea lions and fur seals. In addition to the presence of external ears, eared seals have longer flippers than do earless seals.
Polyurethane is an excellent material with high abrasion resistance characteristics and high tensile strength. Polyurethane oil seals are used in high pressure hydraulic systems where highly stressed parts are subject to wear. These seals are resistant to petroleum oils and hydraulic oils.