我国期货交易所合约规格
https://hetong-1254226132.cos.ap-nanjing.myqcloud.com/hetong-zhuanti20250106/%E5%85%B6%E4%BB%96%E5%90%88%E5%90%8C/%E8%AF%81%E5%88%B8%E5%90%88%E5%90%8C/%E6%88%91%E5%9B%BD%E6%9C%9F%E8%B4%A7%E4%BA%A4%E6%98%93%E6%89%80%E5%90%88%E7%BA%A6%E8%A7%84%E6%A0%BC.doc
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