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二通插裝閥是插裝閥基本組件(閥芯、閥套、彈簧和密封圈)插到特別設(shè)計(jì)加工的閥體內(nèi)，配以蓋板、先導(dǎo)閥組成的一-種多功能的復(fù)合閥。因每個(gè)插裝閥基本組件有且只有兩個(gè)油口，故被稱為二通插裝閥，早期又稱為邏輯閥。

在非專業(yè)化條件下批量制作電子產(chǎn)品的時(shí)候，通常是手工安裝元器件與焊接操作同步進(jìn)行。應(yīng)該先裝配需要機(jī)械固定元器件，先焊接那些比較耐熱的元器件，如接插件、小型變壓器、電阻、電容等；然后再裝配焊接比較怕熱的元器件，如各種半導(dǎo)體器件及塑料封裝的元件。