注:“●”的产品按GB12792-1991标准生产。 “*”的产品按Q/320282DCE037-2003标准生产。 其余产品按MT818-1999标准生产。 Note: “●”indicates that the product is manufactured according to the standard of GB12972-1991 “*”indicates that the product is manufactured according to the standard of Q/320282DCE037-2003. The rest product is manufactured according to the standard of MT818-1999.