樓主: 夕陽書生
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關(guān)于大蒜機(jī)械,,社區(qū)人才濟(jì)濟(jì),定有辦法 |
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焊接變形是焊接質(zhì)量的問題,,工件變形是設(shè)計(jì)的問題!國家到現(xiàn)在都還沒有怎么重視農(nóng)業(yè),,留給促使農(nóng)業(yè)發(fā)展的資金與人才不多,!
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