2993| 5
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哪里要研究螺紋的高校?要測(cè)試螺紋在振動(dòng)場(chǎng)合下的防松能力 |
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點(diǎn)評(píng)
企業(yè)不一定給咱們做啊。咱如果自己做螺栓不就是他們的競(jìng)爭(zhēng)對(duì)手嗎?
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本版積分規(guī)則
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Archiver|手機(jī)版|小黑屋|機(jī)械社區(qū) ( 京ICP備10217105號(hào)-1,京ICP證050210號(hào),浙公網(wǎng)安備33038202004372號(hào) )
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