iron nail短语¹⁴⁴⁹⁷²⁺² 基本例句 铁钉 To determine gold by “ Iron Nail Method” was investigated in this paper. 本文对铁钉法测金进行了研究。 dictall Then from the19th Century there is an early example of a manufactured iron nail, and from the English Civil War, a solid cannon ball. 然后有一个来自19世纪的早期例子——一个工业化制造的铁钉，还有来自英国内战时期的加农炮弹。 yeeyan