1) hedge ratio
套头比
1.
An analysis of the best hedge ratio with the futures;
期货套期保值的最优套头比分析
2) shorts hedging ratio
空头套期比
3) longs hedging ratio
多头套期比
6) tube mill bit
套铣头
1.
On the basis of research for alloy W and many experiment in well site, we select a new type of alloy W, and make the structure of mill - tool better, get a set of high efficient mill - tool, they are flat - base milling bit, concave - base milling bit, cone mill bit, tube mill bit and multiple cone mill bit.
通过对金属钨合金材料的研究和大量现场实验,选择了一种新型钨合金材料,对磨铣工具结构进行了优化设计,形成了高效平底磨鞋、高效凹底磨鞋、高效铣锥、高效套铣头、高效复合铣锥等系列高效磨铣工具。
补充资料：套头
见面具。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条