positive feed drill 强制进料钻床
variation positive feed device 积极式变速喂纱装置
tape positive feed 条带式积极送纱装置
positive feed tape 积极式喂纱条带
power positive feed 电力正馈线
positive feed system 积极喂纱系统
positive feed devices 积极式给纱机构
positive feed mechanism 积极式喂纱机构
gear positive-feed system 齿轮式给纱机构
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