sān tōng
意思解释：（3）有横向出口的短管，用于连接与该管成直角的管道。 以45°从主直管分出的支管，即Y形接管头。
《通典》、《通志》、《文献通考》。《通典》，唐杜佑撰，200卷。内容记载历代典章制度的沿革，上起传说中的唐虞，下迄唐肃宗、代宗。《通志》，南宋郑樵撰，200卷。为综合历代史料而成的通史。《文献通考》，宋元之际马端临撰，34…
open law , open keep in mind , document is connected one's deceased father . open law , tang Duyou is written, 200. The evolution of system of institutions of content account past dynasties, the Tang Yu in fokelore rises on, tang Su an administrative unit in Xizang, Dai Zong is reached below. open keep in mind , zheng Qiao of the Southern Song Dynasty is written, 200. Becomes for historical data of integrated past dynasties general history. document is connected one's deceased father , end of horse of Song Yuanzhi border is faced write, 34...
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