focus-coil

基本解释

In this paper a method which computes the ampere winding of main and auxiliary focus coil of the electron gun is introduced. It offers a reliable way to design the coil and control the output current of electric circuit.
介绍了在电子枪设计过程中,主、辅聚焦线圈安匝数的一种计算方法,为设计线圈绕组的匝数和控制电路的输出电流提供了可靠的依据。
Care must be taken to protect the focusing coils from stray magnetic fields.
必须小心，以防止聚焦线圈产生寄生磁
deflecting focusing coil for camera tube
摄像管偏转聚焦线圈
He was too shortsighted to focus on the object.
他由于近视过深而无法把视力焦点对准在该物体上。
He always wants to be the focus of attention.
他总想成为注意力的焦点。