Imperial and US customary measurement systems different concepts – the imperial gallon is defined in terms of the volume occupied by a specified mass of water, while the US gallon is specified in terms of cubic linear measure. Notes Notes Units of weight in both the imperial and US customary system always used the same standard, though differences in multiples of the avoirdupois pound developed in the nineteenth century. Both systems used the three different scales – the avoirdupois system for general use, the troy system for precious metals and the apothecaries system in the pharmacy industry. The term "weight" and "mass" are used interchangeably in
Silvercorp Metals Silvercorp Metals Silvercorp Metals Inc. (Silvercorp) is a Canadian-based, China focused precious metals company engaged in the acquisition, exploration, and development of silver containing properties. It is China's largest primary silver producer. The company is publicly traded on the Toronto Stock Exchange in Canada and the NYSE in the U.S. Silvercorp Metals operates four silver/lead/zinc mines in an area encompassing the SGX, HPG, TLP and LM mines (the Ying Mining District), owned through its 77.5% and 80% Chinese subsidiary companies, respectively. Silvercorp Metals' other material property, the Gaocheng project in Guangdong Province, owned through a 95% Chinese subsidiary company, began