Biochemical oxygen demand over five days - BOD5: The standard biochemical oxygen demand test whereby a sample of the liquid is incubated at 20 degrees C for five days.
五天生化需氧量（简写为BOD5）：标准的生化需氧量试验。其方法是把一份溶液的样品在摄氏20度下培养五天。
Hydraulic machine test-bed is the important device to optimize and exploit hydraulic machines whose tests demand test-beds have high precision and advanced automatization.
水力机械试验台是开发和优化水力机械产品的主要设备，它要求测试精度高，自动化程度高。
Hydraulic machine test-bed is the important device to optimize and exploit hydraulic machines whose tests demand test-beds have high precision and advanced automatization.
水力机械试验台是开发和优化水力机械产品的主要设备，它要求测试精度高，自动化程度高。
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