生铁铸造 meaning in Chinese

iron casting
iron founding

In 1471 , han yong , governor of guangdong & guangxi , cast iron pillars for the building of a floating bridge over the guijiang river
明成化七年( 1471年) ，两广总督韩雍和太监陈平等筹建浮桥用生铁铸造浮桥铁柱，竖在桂江口两边岸上。
The base has features of high strength and hardness , owing to high quality material of first - class pig iron and casting of interal body . the main duriving shafts are durable in use through high cycle heat treatment of surface
本机器的机座采用于等生铁铸造，强度高、刚性好、主要传动轴类均经表面高周波热处理，经久耐用。