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现行 SAE AS21443/1
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BEARING, BALL, AIRFRAME ANTI-FRICTION, PULLEY CORROSION RESISTANT NITROGEN STEEL (CREN) 轴承 球 机身抗摩擦 滑轮耐腐蚀氮钢(Cren)
发布日期: 2017-02-09
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归口单位: AEROC
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