13/30288692 DC : 0被替代
BS EN 4178 - AEROSPACE SERIES - SCREWS, PAN HEAD, SIX LOBE RECESS, COARSE TOLERANCE NORMAL SHANK, MEDIUM LENGTH THREAD, IN TITANIUM ALLOY, ANODIZED, MOS[2] LUBRICATED - CLASSIFICATION: 1100 MPA (AT AMBIENT TEMPERATURE)/315 DEGREES C
出版：British Standards Institution
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