12-13 more
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product
閥門是(shì)一種(zhǒng)管道附件(jiàn),用于打開和關(guān)閉管道,控制流向,調(diào)節和(hé)控(kòng)制輸送(sòng)介質的(de)參數(溫(wēn)度、壓力和(hé)流量)。根據它(tā)們的功(gōng)能,它(tā)們可(kě)以分(fèn)為截止閥(fá)、止回(huí)閥和調(diào)節(jiē)閥。