bore axis meaning in English

炮膛轴
枪膛轴
糇膛轴线

After nitriding , the abradability of the boring axis is increased greatly
氮化可明显提高镗轴的耐磨性。
The nitriding is an important heat treatment process to boring axis in cnc floor - type milling / boring machine
摘要氮化处理是数控落地铣镗床上重要部件镗轴的常用最终热处理工艺。
If we take out several measuring points along the bore axis and work out the amount of bore wearing , we can consult and calculate the muzzle velocity reduction of the piece by reference of the curve board
沿膛轴方向取若干个测点，当测出各点的炮膛磨损量后，即可从曲线板中查取计算出火炮的初速减退量。