JB / T6900-1993 drain valve JB / T6901-1993 Closed glasses valve JB / T7245-1994 refrigeration apparatus / T7376-1994 pneumatic air valve Technical conditions JB / T7550-2007 air separation equipment with shut-off valve switching valve JB JB / T7745-1995 pipeline valve JB / T7746-2006 necking forged steel valve JB / T8691-1998 wafer type knife gate valve JB / T8692-1998 flue butterfly JB / T8937-2010 Wafer Check Valve JB / T9093- 1999 steam traps technical conditions JB / T9094-1999 LPG equipment emergency shut-off valves for high pressure valves stainless steel valves Guangzhou | Guangzhou valves | valve provided by the Dongguan Ming Kong, the Hong Kong Science and Technology Co., Ltd. valve. Valve Co., Ltd., Dongguan Ming Kong (www.gdmgfm.com) strong, credible, butterfly and other industries in Dongguan, Guangdong has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead valve and you work out of Hong Kong into the brilliant, for a better future!