求翻译：2 基于RP技术的金属模具制造技术基于RP 技术的大型电机壳体金属模具制造技术的实质是用先进的精密热加工代替冷加工，大型快速原型制造系统本身也是一种复杂的NC（二加工设备，它的出现大大改变了模具制造的现状。该技术将NC加工技术从冷加工转移到热加工，以获得精密的“毛坯”即模具，这个概念是现代加工技术发展的趋势。先进制造技术发展的事实证明精密热加工使得“毛坯”精化，甚至制造出精密的零件，从而减少了对冷加工的技术要求，提高了生产效率，降低了成本，是什么意思？

正在翻译，请等待...

2 based on the highly praised RP technology manufacturing technology is based on the large technology RP motor housing with highly praised it is of the essence manufacturing technology with advanced precision thermal processing, replace cold processing large rapid prototyping manufacturing system it

2 based on RP technology of metal mold manufacturing technology of large scale electromotor shell based on RP technology of metal mold manufacturing technology is essentially advanced precision thermal processing instead of cold, fast prototyping system itself is a large complex of NC (second proces