煤粉管(guan)道(dao)換(huan)向(xiang)裝置：                 

方(fang)形(xing)手動(dong)正三(san)(san)通(tong)(tong)(tong)(tong)換(huan)(huan)向(xiang)閥、上圓下方(fang)形(xing)手動(dong)正三(san)(san)通(tong)(tong)(tong)(tong)換(huan)(huan)向(xiang)閥、方(fang)形(xing)氣(qi)動(dong)正三(san)(san)通(tong)(tong)(tong)(tong)換(huan)(huan)向(xiang)閥、上圓下方(fang)形(xing)氣(qi)動(dong)正三(san)(san)通(tong)(tong)(tong)(tong)換(huan)(huan)向(xiang)閥、方(fang)形(xing)電(dian)動(dong)正三(san)(san)通(tong)(tong)(tong)(tong)換(huan)(huan)向(xiang)閥、上圓下方(fang)形(xing)電(dian)動(dong)正三(san)(san)通(tong)(tong)(tong)(tong)換(huan)(huan)向(xiang)閥、套(tao)筒是電(dian)動(dong)三(san)(san)通(tong)(tong)(tong)(tong)閥、擋板式換(huan)(huan)向(xiang)裝置。