subland drillとは 意味・読み方・使い方

Steps in a tool radial direction are formed in a groove 13 on an outer circumference of a small radial part 11 of a stepping drill 10 and in a groove 14 of a large radial part 12 to be a subland structure.例文帳に追加

段付きドリル１０の小径部１１外周の溝１３と大径部１２の溝１４に工具径方向の段差をつけて溝を複溝構造となす。 - 特許庁

In relation to a twist drill having a right hand flute 2, a subland 4, the helix angle of which is smaller than that of the flute 2, is extended from its tip, and its rear end is connected to the flute 2.例文帳に追加

右ねじれのフルート溝２を有するツイストドリルに対して、該フルート溝２よりねじれ角の弱い副溝４を先端より延伸させ、その後端を前記フルート溝２に連通させる。 - 特許庁