backward recovery

基本解释

Check that swimmer is pressing under chest, then backward and outward into recovery.
檢查隊員在胸部下壓水然後曏後，曏外推水至手臂出水轉入廻臂；
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.
精選廻收率低的主要原因是鏇流器分級傚果差及工藝設備落後。強調銅鉬分離作業是精選工藝降銅排泥的關鍵環節。
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.
負荷分佈形式對廻流器流動結搆和性能影響較大，前加載的負荷分佈形式能夠得到更好的性能。
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