2249| 7
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請(qǐng)教,,一種螺栓,,端面沖壓三角形,,如圖,; |
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點(diǎn)評(píng)
謝謝,,我想也是,因?yàn)槎鄶?shù)標(biāo)記都是在六角頭那邊,,所以有點(diǎn)奇怪,;
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