亚洲区欧美区偷拍区中文字幕_中文字幕人成乱码熟女APP_男生和女生一起差差的app下载_亚洲AV永久无码乐播_99久久国产视屏_亚洲欧美不卡在线_天天躁夜夜躁狠狠躁2022同步更新_完全紧缚されて无理やり犯さ_日韩成人高清无码_九七电影午夜福利

stepper motor although there are many advantages, but the natural thing is that the shortcomings will be appropriate, and some, then, and small series together to see what shortcomings are there.
The main drawback is the following:
A. is normally difficult to run at higher speeds.
B. also has advantages in terms of size, weight, and low energy efficiency.
C. also destroys the synchronization when it exceeds the load, and then it emits vibration and noise at high speed.
D. is difficult to obtain a larger torque.
E. and that is, if the control is not good, it will easily resonate.