- 供水: water supply; water delivery ...
- 层: I storey; tier; stratum
- 水层: water-course◇水层生物 pelagos
- 供水: water supply; water delivery; water◇供水船 water boat; waterbark; 供水工 waterman; 供水管 feed pipe; water service; 供水管线 hydraulic supply line; 供水器 water-feed(er); 供水区 contributory zone; 供水站 water stop; tank station
- 排水层;疏水层: drainage layer
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