5014| 23
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請(qǐng)教龍門桁架裝配調(diào)試是如何保證平行跟等高的?? |
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點(diǎn)評(píng)
中間切換基準(zhǔn),就只有2米了
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點(diǎn)評(píng)
用個(gè)長(zhǎng)的方鋼管,中間放水平儀
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