backward recovery

基本解释

Check that swimmer is pressing under chest, then backward and outward into recovery.
检查队员在胸部下压水然后向后，向外推水至手臂出水转入回臂；
The reason why the recovery efficiency of cleaning is low is that the classification effect of cyclone is not good and the technical equipment is backward.
精选回收率低的主要原因是旋流器分级效果差及工艺设备落后。强调铜钼分离作业是精选工艺降铜排泥的关键环节。
Generally, the forward loading return vane could achieve higher total pressure recovery coefficient and much more uniform discharge flow than the backward loading return vane.
负荷分布形式对回流器流动结构和性能影响较大，前加载的负荷分布形式能够得到更好的性能。
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