HSB600, HSB460 Bridge Building Structural Steel

H-Beam
BS H-BEAM, British Standard UB H-Beam
2015년 3월 13일
AISI-SAE
AISI 4340, SNCM439 High Toughness Alloy Steel
2015년 3월 17일
HSB600, HSB460 Bridge Building Structural Steel
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