should reserve three pumps
...应备用三台泵，运转，一台备用，一台维修。 On the need for a 24-hour non-stop operation of the pump, should reserve three pumps, operation, a backup, a maintenance. .
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should reserve three pumps
应该预留三个泵
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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On the need for a 24-hour non-stop operation of the pump, should reserve three pumps, operation, a backup, a maintenance.
对需24小时连续不停运转的泵，应备用三台泵，运转，一台备用，一台维修。
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