soft-spoken adjective. âº usually âspeaking in a âquiet âvoice: a soft-spoken, âunderstated âstyle. (Definition of soft-spoken from the Cambridge Academic Content Dictionary Â© Cambridge University Press).
The laser drilling process involves the use of an infrared laser (of surgical grade at a wavelength about 1064 nm) to bore very fine holes (less than 0.2 millimeters or 0.005 inches in diameter) into a diamond to create a route of access to a black carbon crystal inclusion.
Diamond can be used to make grinding tools, which have following advantages: 1  High grinding efficiency, Low grinding force: Less heat will be generated by the hole in the grinding process. 2  High wear resistance: Diamond grinding tools' change in dimension is small.