发明授权
US09297121B2 Process for the production of ballast 有权
镇流器生产工艺

Process for the production of ballast
摘要:
A process for the production of ballast for railway track laying, road construction, dam construction and bank protection, wherein ballast stones are spread out to form ballast and a reaction mixture for the preparation of a polyurethane foam, produced from components by a low-pressure process, is applied between the spread ballast stones.
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