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【单选题】
加工齿轮、丝杠时,试指出下列各情况哪些属于加工原理误差( )。
A.
传动齿轮的制造与安装误差
B.
母丝杠的螺距误差
C.
用阿基米德滚刀切削渐开线齿轮
D.
尺寸和形状误差
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Passage 3 Questions 11 to 15 are based on the following passage: Scientists in India have invented a new way to produce electricity. Their invention does not get its power from oil, coal or other fuel...
A.
Because bullocks have long been used by Indian people
B.
Because bullocks walk slowly and are easy to control.
C.
Because there are few non-working bullocks in India
D.
Because there is not enough oil in India.
【多选题】丝杠牙型误差产生的原因：（）。
A.
金刚石笔未固紧，修整砂轮时产生微量移动；
B.
修整砂轮时行程不均匀；
C.
砂轮磨损；D、砂轮组织不均匀；
D.
E、砂轮修整器调整不当；
E.
F、工件的螺旋升角太大，砂轮与牙面产生干涉；