JDK Diamond Segment for Core Bit

Diamond segments are the function parts of a metal-bonded "http://en.wikipedia.org/wiki/Diamond_tool">diamond tool. The metal-bonded diamond tool can be a metal-bonded "http://en.wikipedia.org/wiki/Diamond_blade">diamond blade, a "http://en.wikipedia.org/wiki/Diamond_grinding_cup_wheel">diamond grinding cup wheel, a "http://en.wikipedia.org/wiki/Diamond_core_drill_bit">diamond core drill bit, a diamond gang saw blade, etc. The diamonds of a metal-bonded diamond tool are all in the tool's diamond segments to play their role of cutting or grinding.