展会时间:2021-04-02 至 2021-04-04
东北地区包括辽宁、吉林、黑龙江省及内蒙古东部四市区,管辖面积62.6万平方公里,人口1.5亿,是我国供热供暖重要的区域。每年采暖期较长,少则4个月,多达6个月 ...
|小黑屋|展会港
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