GB中國國家標(biāo)準(zhǔn)。 AISI (America Iron and Steel Institute) 美國鋼鐵協(xié)會(huì)ASTM (America Society for Testing and Material)美國材料與試驗(yàn)協(xié)會(huì)ASME (America Society of Mechanical Engineers)美國機(jī)械工程學(xué)會(huì)API (America Petroleum Association)美國石油協(xié)會(huì)JIS (Japanese Industrial Standards)日本國家標(biāo)準(zhǔn)LR (Lloyd&ls