常衡单位，常衡制
avoirdupois //
名词 a system of weights used in many English-speaking countries. It is based on the pound, which contains 16 ounces or 7000 grains. 100 pounds (US) or 112 pounds (Brit) is equal to 1 hundredweight and 20 hundredweights equals 1 ton 常衡; 许多讲英语国家所用的重量系统 (Abbreviation avdp, avoir)
常衡制
A unit of weight in the U. S. Customary System, an avoirdupois unit equal to437.5 grains (28.35 grams).
盎司美国度量衡制的一个重量单位，常衡等于437。5格令(28。35克)。
A unit of weight in the U. S. Customary System, an avoirdupois unit equal to0.002285 ounce (0.065 gram).
格令美国惯用体系的重量单位，一常衡单位等于0。002285盎斯(0。065克)。