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Hoʻopaʻa paʻa no nā kaʻa 4D
ʻO ka papa hale kūʻai ikaika ʻehā ʻo ia ka nui o nā ʻāpana rack, Sub-channel crossbeams, Sub-channel tracks, horizontal tie rod device, Main channel crossbeams, Main channel tracks, Connection of racks and ground, adjustable feet, back pulls, pale. nā ʻupena, nā alapiʻi mālama, ʻO ka mea nui o ka papa he Q235 / Q355, a ua koho ʻia nā mea maka o Baosteel a me Wuhan Iron a Steel a hana ʻia e ka ʻōwili anuanu.