pole core 磁极铁心 ; 电极芯子 ; 磁极铁芯 ; 电极铁心
main pole core 主磁极铁心 ; [电] 主极铁心
Magnetic Pole Core 磁极铁芯
pole-core width 极身宽度
Pole Core Insulation 磁极核心绝缘
main machinery pole core 主磁极铁心
Core pole 芯杆
Shaded Pole Motor Core 罩极电机铁芯
The Earth isn't completely spherical - land at the North Pole is a number of kilometres nearer to the core of the planet than land at the Equator.
事实上，气球并非是一个完美的球体，北极地区要比赤道地区更加接近地心，两地之间的这一差距大概是在数公里。
Changes in the thickness, viscosity and conductivity of the outer core in the past could have led to convection patterns that caused the magnetic pole to tilt.
过去任何来自于核外层的厚度、粘性和导电性变化都会导致对流形式变化从而引起磁极倾斜。
Thee Earth isn't completely spherical - land at the North Pole is a number of kilometres nearer to the core of the planet than land at the Equator.
事实上，气球并非是一个完美的球体，北极地区要比赤道地区更加接近地心，两地之间的这一差距大概是在数公里。 E。
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