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压力加工中,冲孔有两种读音。大家在读音时,是不是得先判断它是名词还是动词呢? |
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小黑屋|手机版|Archiver|机械社区 ( 京ICP备10217105号-1,京ICP证050210号,浙公网安备33038202004372号 )
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