shell moulding是什么意思

用法例句

In order to apply such steel to the manufacturing of spiral case of turbine for Sanbanxi Hydropower Station,the welding tests on WDB620 steel were carried out and then it was compared with the performances of NK-HITEN 610 U2 steel produced by NKK Company in Japan.

国产WDB620钢是610MPa级低焊接裂纹敏感性高强度钢,为了将该钢种应用到三板溪水电站的水轮机蜗壳制造中,对WDB620钢进行了焊接试验,并与日本NKK公司生产的NK-HITEN610U2钢进行了性能对比。