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5 Advancements in Transportation Technology Business visit in South Korea Company granted the highest level of testing qualification Company updated its testing business scope on road engineering Company updated testing items for CMA certification Cooperation in Ethiopia Cooperation with UK & Canada

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20th Anniversary Annual Meeting 2013 Annual Meeting 2014 Annual Meeting 2015 Annual Meeting 2017 Annual Meeting 2018 Annual Meeting 2019 Annual Meeting 2020

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Second United Nations Global Sustainable... The First 3D-Controlled Cylinder Finishe... 3D GUIDANCE: WILL IT SAVE TIME AND MONEY... 3D PRINTING MARKET TAKING SHAPE Differences between HMA and WMA Asphalt pulverization - a recycling meth...

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Weixing bridge under the ZCB1-3 contract... Shuangzishan double line tunnelling thro... Successful hoisting of the Heishui River... Company supervised Fujiang bridge beam a... Grafting external research and developme... Company won the 2021 credit rating AA gr... Construction of the first piece project... The first tunnel of the Seventh Contract... Site regular meeting on safety and envir... The first prefabricated beam plate for t...

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Gas concentration limit construction of... Gas work areas in the gas tunnel (Series... Gas Tunnel Classification (Series 3) Terms used for tunnels with gas (series... Terms used for tunnels with gas (Series... Earth-rock materials in subgrade filling... Treatment of earth-rock subgrade （Serie... Construction quality control of earth-ro... Suspension bridge Installation of the spherical hinge lowe...