鐘(zhong)罩閥在驅動(dong)(dong)裝(zhuang)置得電(dian)啟動(dong)(dong)的同(tong)時(shi),同(tong)步器同(tong)時(shi)啟動(dong)(dong),推動(dong)(dong)驅動(dong)(dong)裝(zhuang)置作直線(xian)同(tong)步前進(jin)或后退,確保(bao)閥盤啟閉的垂直中心運動(dong)(dong)。
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