Knee replacement surgery, which can take 1 to 2 hours, has become so precise that doctors can choose from a variety of knee designs that suit your height, weight, and activity level. The implants, as they are called, are made from a variety of materials, including metal, ceramic, or plastic.
Amazon Standard Identification Number. ASIN redirects here. For other uses, see Asin (disambiguation). The Amazon Standard Identification Number (ASIN) is a 10-character alphanumeric unique identifier assigned by Amazon.com and its partners for product identification within the Amazon organization. Usage and structure.
The main thing is to have a primary key distinguishing each item in inventory uniquely -- a name, a code, a serial number. Numbers used for their cardinality don't usually need to be operated upon e.g. by the addition or subtraction operators.