托福长难句分析.The technique of direct carving was a break with the

The technique (of direct carving) was a break with the nineteenth- century tradition { in which [ the making of a clay model was considered the creative act ] and [ the work was then turned over to studio assistants to be cast in plaster or bronze or carved in marble]}.
in which ,即 in tradition,后面两个是并列句
the making of a clay model was considered the creative act 与
the work was then turned over to studio assistants to be cast in plaster or bronze or carved in marble 并列关系