相对于上一交易日的结算价，交易中最大的升幅或降低。
The maximum advance or decline from the previous day's settlement price permitted for a contract in one trading session by the rules of the exchange.
相对于上一交易日的结算价，交易中最大的升幅或降低。
The maximum advance or decline from the previous day's settlement price permitted for a contract in one trading session by the rules of the exchange.
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