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дренажное устройство stresses
gen.	排水设备
avia.	水设施; 排水装置; 排污设备
el.	排水器; 暗渠; 疏水; 排水; 泄水; 排水系统; 排泄器; 疏水器; 用暗沟排水; 底部排水; 阴沟
O&G	排泄装置
tech.	排泄设备