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M27 segment tunnel bolts, strength grade 8.8 for Xian Metro Line 6
In 2018, Anyang Railway Equipment Co., Ltd. provided M27 segment tunnel bolts, grade 8.8 hot-dip galvanizing to Xi’an Metro Line 6
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Xi’an Metro Line 6 is the 7th subway line in operation in Xi’an, Shaanxi Province, China. As of December 2020, Xi’an Metro Line 6 has a total length of 15.6 km, all of which are underground.
In 2018, Anyang Railway Equipment Co., Ltd. provided M27 segment tunnel bolts, strength grade 8.8 hot-dip galvanizing to Xi’an Metro Line 6, and the acceptance standards for segment tunnel bolts implemented “Specifications of high strength bolts with large hexagon head, large hexagon nuts, plain washers for steel structures” (GB/T1231) and “Code for construction and acceptance of shield tunneling method” (GB50446-2008).
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