arterial drain
... arterial hypertension 高动脉压,动脉性高血... arterial blood 动脉血 arterial drain 干线排水管 ...
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市政整体排水系统程序如下：路面雨水→雨水井→沉泥井→过街排水管→排水检查井→地下排水主干线。
The whole city drainage system program is as follows: rain water wells road, clay and drain well across the street and drainage inspection wells and underground drainage main lines.
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