Each individual artisan retained the techniques on the manufacturing and transferred the understanding only to apprentices. Production was restricted to manual functions. . Within the Cambridge English Corpus The names and addresses of manufacturers of Unique apparatus or components really should be mentioned. Within the Cambridge English Corpus In vain https://share.here.com/p/s-Yz1Db21tZXJjaWFsJTIwU2VydmljZXM7aWQ9ODQwOXFoMHctMGQwYjIzZDQzNDA3YTIxNTZkNDEzYjc5NWM2NzUxNGI7bGF0PTMzLjg2NTk0O2xvbj0tMTE3LjgyNDEyO249Q1JEK01GRzsrSW5jLjtwaD0rMTcxNDg3MTMzMDA=?z=16&t=normal