GB / T4213-2008 pneumatic control valve GB7512-2006 liquefied petroleum gas cylinders GB / T8464-2008 GB10877-1989 plumbing connection valve with internal thread GB10879-2009 oxygen cylinders acetylene cylinder valve GB / T12232-2005 General valve flange connection iron gate GB / T12233-2006 General valve iron globe valves and lift check valves GB / T12244-2006 valve general requirements GB / T12246-2006 GB13438-1992 argon gas cylinder valve, pilot valve GB13439- 1992 chlorine cylinders GB / T13932-1992 General valve iron swing check valves GB / T15185-1994 GB15382-2009 iron and brass ball valve cylinder common technical requirements JB / T450-2008 PN1.6 ~ 32.0 Forging angle MPa high-pressure valves, fittings, fasteners and technical conditions Shanghai Guanlong Valve Machinery Co., Ltd. Shanghai and Shanghai Valve Manufacturing Co., valves, valve out of Hong Kong, the Hong Kong provided by the Dongguan 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!