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| bacteria bed | |||
| bacterial bed A device that removes some suspended solids from sewage. Air and bacteria decompose additional wastes filtering through the sand so that cleaner water drains from the bed (用于去除污水中悬浮固体物质的装置。 由曝气和细菌分解从沙中过滤的废污，使干净的水得由细菌床中排出。) | |||
| bacterial bed | |||
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| bacterial bed | |||
| 细菌床: 2 phrases in 2 subjects |
| Oil / petroleum | 1 |
| Technology | 1 |