At low frequencies, such as 10 per sec., pulsation is sensed rather than vibration.在低频率(譬如每秒十次)时, 所感觉到的是脉冲而非振动.If the roller pulsation, the pressure on paper as cause misregister.如果滚子径向跳不静, 则差纸的不张辛有不小有小,致使套印禁绝.Vortexing ...
Judges with an international brevet are integral to the development of Acrobatic Gymnastics.国际裁判员要全身心地为发展技巧运动服务.Olga Korbut single-handedly turned gymnastics into a major event.奥尔佳·科布特独自一人将体操变成了一项重要赛事。a gift for gymnasti...