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Terms for subject United States containing 业余 | all forms | in specified order only
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业余无线电爱好者卫星公司Amateur Radio Satellite Corporation
业余火箭爱好者协会Amateur Rocket Association
同步轨道业余无线电爱好者转发卫星synchronous amateur radio transponder
航天飞机业余无线电爱好者实验shuttle amateur radio experiment