英文不锈钢管的规格表里的一些字“CLA”,"DEF","PUMA5","REV""SAW""P.L.""Len.mm""U.m","Rev","Sch.mm"都是缩写吗?求详细且准确翻译~

　　英文不锈钢管的规格表里的一些字

　　“CLA”,"DEF","PUMA5","REV""SAW""P.L.""Len.mm""U.m","Rev","Sch.mm"

　　都是缩写吗?求详细且准确翻译~