open space ratio 开敞空间比例 ; 空地率
open loop ratio control systems 开环比值控制系统
open pores ratio 开孔隙率
open hole ratio 开孔率
open time ratio 开启时间比
open-circuit voltage ratio 开路电压比
determination of open porosity ratio 显气孔率测定
Effectiveness Ratio with Open Equity 包含未平仓净值的绩效比率
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