Improvements in or relating to the manufacture of metal articles having teeth or threads
摘要
<p>Metal articles (other than files) having teeth or threads such as taps, threading devices, reamers and self-tapping screws are hardened by the process described in the parent Specification.</p>
申请公布号
GB597375(A)
申请公布日期
1948.01.23
申请号
GB19450021044
申请日期
1945.08.17
申请人
ALFRED GORDON EVANS ROBIETTE;EDMONDS FRANK MACTAGGART
