【多选题】铣削螺旋齿刀具端面齿时,除通常的计算.调整外,还应注意( )等事项。
A.
分度头具有较高的等分精度,需要时能作微量调整
E.
如果刀具的端面齿呈折线,则棱边的宽度将由铣齿背时予以保证
【单选题】—You shall get an iPhone as long as you come out first in the contest. —Is that a _________? Don't let me down, I hope. [ ]
【单选题】Hairdresser:How would you like to do your hair today?You’re not in a hurry, are you?Mrs.Lee:N0.__________.
【单选题】( )是一种在竖向荷载作用下无水平反力的结构。
【单选题】_______ you sit in front of the computer all day while working, you’d better take exercise for at least an hour every day.