專(zhuān)業(yè)生產(chǎn)回轉(zhuǎn)蓋快開(kāi)手孔,旋柄快開(kāi)手孔,常壓快開(kāi)手孔 河北潤(rùn)德管道制造有限公司(王鳳杰15930795444)專(zhuān)業(yè)生產(chǎn)保溫人孔,矩形保溫人孔,500*600矩形保溫人孔,煙粉煤74DD,板式平焊法蘭手孔,帶頸對(duì)焊法蘭人孔,常壓快開(kāi)手孔,旋壓快開(kāi)手孔,回轉(zhuǎn)蓋快開(kāi)手孔,HG/T21534-2005保溫人孔,矩形保溫人孔,.500*600矩形保溫人孔,煙粉煤74DD,板式平焊法蘭手孔,帶頸對(duì)焊法蘭人孔,常壓快開(kāi)手孔,旋壓快開(kāi)手孔,回轉(zhuǎn)蓋快開(kāi)手孔,HG/T21534-2005保溫人孔,矩形保溫人孔,500*600矩形保溫人孔,煙粉煤74DD,板式平焊法蘭手孔,帶頸對(duì)焊法蘭人孔,常壓快開(kāi)手孔,旋壓快開(kāi)手孔,回轉(zhuǎn)蓋快開(kāi)手孔,HG/T21534-2005