primern.启蒙书；入门书n.雷管；底火；底漆primer for concrete混凝土底涂料Primer vector theory主矢量理论primer gilding brass雷管黄铜primer binding regionPBRprimer detonator unit起爆雷管primer for rusted steel[化] 带锈底漆primer for rusty surface带锈表面底漆primer-oligomerization引物聚合primer - topcoat in one底面合一型primer extension analysisPEA