Drills and reamers-Combined drills and countersinks (centre drills)
钻头和铰刀
发布日期:
1972-07-28
无保护倒角、带保护倒角或半径形式的中心孔组合钻和埋头钻(中心钻)的名称和尺寸。
Designations and dimensions of combined drills and countersinks (centre drills) for centre holes, without protecting chamfers, with protecting chamfers or of radius form.