皮革耐曲折-耐伸缩 Resistance to Damage by Flexing(vamp)-- "常温5万次 First 50,000" "BS 3424* Part9 Annex NA,BS EN ISO 5402-2* TM 25,ISO 4643 Annex B,ISO 22288 QB/T 2224-2012" "常温每增加5万次 additional 50,000" "低温 5万次 First 50,000" "低温 每增加5万次 additional 50,000" 皮革耐曲折-耐挠 Bally Flexing resistance "常温5万次 First 50,000" "BS 3144* Part 13,DIN EN ISO 5402*,BS EN 13512*,BS EN ISO 5402-1* QB/T 2714,ASTM D6182,ISO 17694,TM 55, GB/T 3903.41#" "常温每增加5万次 additional 50,000" "低温 5万次 First 50,000" "低温 每增加5万次 additional 50,000"