球墨(mo)鑄鐵管配(pei)件雙承(cheng)單(dan)支(zhi)盤三(san)(san)(san)通(tong)(tong)(tong)球墨(mo)鑄鐵管配(pei)件雙承(cheng)單(dan)支(zhi)盤三(san)(san)(san)通(tong)(tong)(tong)是(shi)熱熔(rong)注塑對接同徑三(san)(san)(san)通(tong)(tong)(tong),也稱等(deng)徑三(san)(san)(san)通(tong)(tong)(tong),為管件、管道(dao)連接件,用在主管道(dao)要分支(zhi)管處(chu)。等(deng)徑三(san)(san)(san)通(tong)(tong)(tong)是(shi)三(san)(san)(san)通(tong)(tong)(tong)的一(yi)種,三(san)(san)(san)通(tong)(tong)(tong)有(you)一(yi)般等(deng)徑三(san)(san)(san)通(tong)(tong)(tong),異(yi)徑三(san)(san)(san)通(tong)(tong)(tong)兩(liang)種。因為三(san)(san)(san)端可(ke)以與管子連接而命名。