传硕公版书
铜铁铅
未通商前，惟中国与荷兰在长崎互市。其时，乍浦购铜之船每岁一至。惟德川氏主政时，岁限船额、限铜数，所购亦不多。至近年来，间一购买而已。
铁、铅二物，国产不足供用，外国多有输入者。
日本国志 · 黄遵宪 · Chapter 123 of 140
铜铁铅
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