Marine aggregates: production tonnage and fleet size; business estimates; ben...

Marine aggregates are included in a larger "aggregate extraction" sector in the French classification of economic activities. Key figures are therefore estimated, based on (1)...在法国经济活动分类体系中，海洋集料（Marine aggregates）被归入更广范畴的“aggregate extraction”行业门类。因此，核心统计指标基于（1）……进行估算。