美国农业部的国际“通用标准”：等级和颜色以美国农业部每年修订的标准样为贸易中品质标准，由于该标准已被国际上广泛接受，因此该标准既叫“美棉标准”，又称“国际通用标准”。小样标准：此标准一般以卖方提供的小样作为品质标准。一般小样仅代表等级，长度、细度、强力等 USDA International “Common Criteria”: Grades and Colors The standard revised by the USDA annually as a quality standard in trade, which has been internationally accepted as both the “U.S. standard” and the standard Called “international standard”. Sample standard: This standard is generally provided by the seller’s sample as a quality standard. General sample only represents the level, length, fineness, strength and so on