标 准 号：BS EN 2874-1996 简体中文标题：钝化处理的耐热镍基合金中长度螺纹紧公差标准螺杆的大双六角头螺栓.等级:1550MPa(室温)/315℃ 繁体中文标题：钝化处理的耐热镍基合金中长度螺纹紧公差标准螺杆的大双六角头螺栓.等级:1550MPa(室温)/315℃ English Name：Bolts, large bihexagonal head, close tolerance normal shank, medium length thread, in heat resisting nickel base alloy, pass...