暗管指利用地下管道排放污水的方式。
... compressed air pile hammer 压缩空气打桩锤 concealed conduit 暗管 concrete strength 混凝土强度 ...
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... underground missile 地下（发射的）导弹 underground pipe 暗管 underground spring 地下泉 ...
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暗管敷设 concealed piping
暗管苔藓虫科 [古生] Ceramoporidae
暗管排水 buried pipe drainage ; tile drainage
埋设照明暗管 Laying light pipe ; Planted lighting closed ; Lighting underground pipe laying
地下暗管灌溉 irrigation by buried pipes
暗管线 closed conduit wiring
暗管冲淤机 machine for cleaning drain pipe
显像管暗平衡绿色调整 GCUT ; C-G ; GRC ; GCF
显像管暗平衡蓝枪调整 BCF ; B - CO ; BRC ; BB
布线时要用暗管敷设，导线在管内不应有接头和扭结。
When you use the wiring laying underground pipe, wire in the pipes should be joint and kink.
暗管排水可以很好的控制排除农田地下水和土壤含水量，提高土地利用率。
Pipe drainage system has big control of excluding agricultural groundwater and soil moisture and raise the utilization of land area.
暗管排水在20世纪中期初步形成，近30 ~ 40年在美国、日本、埃及等国家得到广泛应用。
The subsurface pipe drainage came into being just in the metaphase of20th century. It was broadly applied in USA, Japan and Egypt for30 ~ 40years.
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