直到本世纪初，才开始批量生产宽板高强钢，这样，使用国产高强钢制造大型球罐已成为可能。
Till the beginning of this century, broad board with high strength steel is produced in large quantities, which makes it possible to manufacture large spherical tank with domestic high strength steel.
因此，作为国产高强钢板应用于大型球罐的技术需求，大瓣片高强钢球罐壳板成形机理及本构关系研究势在必行。
So with the application of domestic high strength steel in large spherical tank, it becomes imperative to study the formation mechanism and constitutive relationship of large petals.
LT50钢是从日本引进的一种理想的乙烯球罐用钢。
Imported from Japan, the LT50 steel is an ideal steel for spherical ethylene tanks.
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