GB/T 25018-2010 Marine water lubrication stern shaft sealing apparatus

GB/T 1040.2-2006 Plastics—Determination of tensile properties—Part 2:Test conditions for moulding and extrusion plastics GB/T 2411-2008 Plastics and ebonite—Determination of indentation hardness by means of a durometer(shore hardness) GB/T 3489-1983 Hardmetals—Metallographic determination of porosity and uncombined carbon GB/T 3849-1983 Hardmetals—Rockwell hardness (scale A) test method GB/T 3850-1983 Impermeable sintered metal materials and hardmetals—determination of density GB/T 3851-1983 Hardmetals—determination of transverse rupture strength GB/T 3960-1983 Test method for friction and wear of plastics by sliding GB/T 700-1988 Carbon structural steels GB/T 700-2006 Carbon structural steels GB/T 1176-1987 Specification for cast copper alloys GB/T 1176-2013 Casting copper and copper alloys GB/T 1220-1992 Stainless steel bars GB/T 1220-2007 Stainless steel bars GB/T 2054-2005 Nickel and nickel alloy sheets GB/T 2054-2013 Nickel and nickel alloy plate and sheet GB/T 2054-2023 Nickel and nickel alloy plate and sheet GB/T 2056-2005 Copper、zinc、cadmium、nickel、tin anode sheets for electric plating GB/T 4237-1992 Hot rolled stainless steel sheets and plates GB/T 4237-2007 Hot rolled stainless steel plate, sheet and strip GB/T 4237-2015 Hot rolled stainless steel plate,sheet and strip GB/T 4240-1993 Stainless steel wires GB/T 4240-2009 Stainless steel wires GB/T 4240-2019 Stainless steel wires GB/T 13384-1992 General specifications for packagings of mechanical and electrical products GB/T 13384-2008 General specifications for packing of mechanical and electrical product JB/T 8871-2002 Mechanical seal hard metal sealing ring blank HG/T 2811-1996 Rubber Materials for Rotating Axial Lip Sealing Rings