Cov ntaub ntawv

GBT 3087-2022

ASTM A335-2019

ASTMA53

SANS62-1：2013

JIS G3125-2015

GOST 633_1980

GB-T14976-2012 Cov yeeb nkab hlau tsis muaj qhov tsis sib xws rau kev hloov pauv kua dej

GB_T12459-2017

GB 3274-2017

GB 713-2014

EN10025-1

BS_EN_10025_2_2019

BS EN 10025-3-2019

ASTM_ A450_A450M-2004a

ASTM A530_A530M-2012

ASTM A234_A234M-2018

GOST-380-2005-E2008-ENG

GOST_8732-78

Cov qauv ntawm cov yeeb nkab hlau kheej kheej, cov ntaub ntawv thiab cov kev cai

GB_T12459-2017

GOST8639-82

GOST 10704_1991

GOST 8732_1978

Tus lej HS