天然珍珠（美術）或培養，寶石或貴重金屬，金屬包貴金屬（斑塊）及製品，首飾，硬幣, 71 Natural or cultured pearls, precious or semi-precious stones, precious metals, metals clad with precious metal and articles thereof; imitation jewelry; coin, 71.06 -silver (including silver plated with gold or platinum), unwrought or in semimanufactured forms, or in powder form:, 71.06.9 -silver (including silver plated with gold or platinum), unwrought or in semimanufactured forms, or in powder form: --others, 71.06.92 -silver (including silver plated with gold or platinum), unwrought or in semimanufactured forms, or in powder form: --others ---semimanufactured:, 業務, 業務