Making use of permanent magnetic material as the vibration power, a permanent magnetic vibratingdrill machine is developed, which is simple in structure, convenient in operation and low in price.
研制了一种永磁振动钻床，采用永磁材料作为振源，其结构简单，操作方便，价格低廉。
2
It is a very obvious phenomenon of the drill string vibrating in the drilling.
钻柱振动现象在钻井施工中是非常突出和明显的现象。
3
Mechanical model of the drill carriage with rotation and vibrating hammer for the new type taphole drill is established.