12-13 more
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product
閥門是(shì)一(yī)種(zhǒng)管道(dào)附件(jiàn),用于打開和(hé)關閉管(guǎn)道,控制流向,調(diào)節(jiē)和(hé)控制(zhì)輸送介質(zhì)的參(cān)數(溫(wēn)度、壓力和(hé)流量)。根據(jù)它們的功能,它(tā)們可(kě)以分為截(jié)止閥、止回(huí)閥和調節閥(fá)。