Several house drains, usually of 10 cm internal diameter and made of fired clay, flow into the streetsewer which is of 15 23 cm diameter.
住宅的排水管道通常用若干条内径为10厘米由烧结粘土成制的管道,通往管径15 23厘米的街道污水管。
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Stranger One: "Hank" : On a street near my house, they have been repairing a faulty sewer main and a slightly older gentleman holds the "SLOW" sign to signal to the cars passing by.