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請教地鐵扣件螺栓斷裂原因!(附現(xiàn)場照片) |
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點評
您是專業(yè)滴,俺是外行。俺的理解是,達(dá)不到要求的彈墊,用了不如不用,反而是累贅。達(dá)到標(biāo)準(zhǔn)的工況除外!
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