6703| 20
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關(guān)于起重機(jī)結(jié)構(gòu),,兩種方案,,征求意見 |
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點(diǎn)評
當(dāng)然,,這前提又是單工字鋼抗彎不夠,,2T的電葫蘆其實(shí)一個工字鋼就夠了,我們車間5T的電葫蘆才用這么大的
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