the secondary sector
noun [ S ] finance & economics specialized uk/ˈsek.ən.dri ˌsek.tər/ us/ˈsek.ən.der.i ˌsek.tɚ/
第二产业（用第一产业制造的原材料生产成品的产业）
industries where finished products are made from materials produced in the primary sector
Compare: the primary sector