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| 可交付品级 (期货交易所 (future exchange) 的卖方在执行合同时要按基本品级 (basic grade) 或交易所预先规定的 tenderable grade 交货) | |||
| 可交付品级 | |||
| 可交付等级; 可交易等级 | |||
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| 可交割等级 | |||
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