CT is the abbreviation of English, which can be expressed as: weight unit carat of gemstone, computer X-ray tomography technology, setting time, current transformer in power system, installation of building water and electricity, cross-stitch cloth, resolution, etc. Oz is the abbreviation of the symbol ounce, which is called "ounce" in Chinese (translated from Hong Kong into ounce). It is an English unit of measurement, and it is also called English II when used as a unit of weight. 1 oz = 28.350g. The unit is centilitres.