| 新华社石家庄12月18日电（记者杨帆 、冬奥秦婧）距2022年冬奥会开幕还有四百多天 ，家口silo roll forming machine记者18日从河北省张家口市冬奥办了解到 ，赛区roof sheet forming machine目前张家口赛区场馆主体已完工。场馆metal sheet roof roll forming machine主体double layer forming machine |
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