golden gut
问题描述：
golden gut
During their long partnership,Weill was the strategist with the golden gut,Dimon the nuts-andbolts operator who made the machine work.Citigroup was the culmination of their grand design.
还有nuts-and-bolts operator是什么意思？
如果可以的话，能否把整句话翻译以下阿？
答
在他们的长期合作中,Weill是拥有极好头脑的策划者,Dimon是使机器工作的具体操作员.Citigroup是他们主要设计的核心.