聚焦四极磁铁
focusing quadrupole magnet
偶极-四极效应
dipole-quadrupole effecty
四极-四极力
quadrupole quadrupole force
旋转四磁极磁化场
Key words: Rotary quadrapole magnetized field
T形件有效长度
effective length of T-stub
车架有效长度
chassis frame useful length
door width
电枢绕组导线的有效长度
active length of armature winding
光通道有效长度
amicable orthogonal design
轨道有效长度
effective length of track
接收天线有效长度
effective length of receiving antenna