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GB 11227—89 用户和制造厂对弹性联轴器技术性能项目要求GB 6444—86 平衡词汇GB 4201—84 通用卧式平衡机校验法GB 7662—87 立式平衡机校验法
GB 11227-89 users and manufacturers of flexible coupling technical performance requirements GB 6444-86 balanced vocabulary GB 4201-84 universal horizontal balancing machine calibration method GB 7662-87 vertical balancing machine calibration method