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Explanation: The purpose of the water ditch is not very clear but I guess it has a diluting (defending) function if spills occur. (Same thinking as with a moat)
Mats Wiman Sweden Local time: 02:13 Works in field Native speaker of: Swedish PRO pts in category: 10
Notes to answerer
Asker: I actually don't think there is any water in it. I might just call it "ditch".
1 hr confidence: peer agreement (net): +1
Explanation: You might consider this term, as it seems to be widely used in indoor industrial setting. I searched 'clean room drainage channel' and found there is a lot of specific equipment for this, including various forms of 'channels'.
Deane Goltermann Sweden Local time: 02:13 Native speaker of: English, Swedish PRO pts in category: 23
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