opening & closing rate 开盘汇率与收盘汇率
opening rate & closing rate 开盘汇率与收盘汇率
opening rate and closing rate [金融] 开盘汇率与收盘汇率
To raise the success rate of opening and closing the two-stage cementing tool, Model dsg-a cementing tool is developed.
为提高现有双级注水泥器打开和关闭的成功率，研制了DSG—A型系列双级注水泥器。
In addition to opening and closing motor drive more smoothly, without too much momentum the shortcomings of the moment, the failure rate can be greatly reduced.
此外，以马达驱动方式开闭较平顺，无瞬间冲力过大的缺点，故障率可大幅降低。
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