JB / T2775-1992 PN16.0 ~ 32.0MPa nut JB / T2776-2010 PN16.0 ~ 32.0MPa lens pad JB / T2777-1992 PN16.0 ~ 32.0MPa nonporous lens pad JB / T2778-2008 PN16.0 ~ 32.0 MPa fittings and fasteners temperature mark JB / T5298-1991 line / T5299-1998 steel plate valve with pilot check valve JB JB / T6441-2008 compressor valve JB / T7747-2010 needle globe valve JB / T7749-1995 cryogenic valves technical conditions JB / T8527-1997 metal sealing butterfly valve JB / T8528-1997 common seal butterfly JB / T8529-1997 flameproof valve electric device technology JB / T8531-1997 valve manual device technology, Taiwan Toyama Valve Co. Tianjin Tanggu Watts Valve Co., valves, valve out of Hong Kong, the Hong Kong valve provided by the Dongguan Science and Technology Co., Ltd. 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!