When the galvanometer reads zero the circuit is in the null - balance position.当检流计的读数为零时,电路处于零平衡位置.If a sinusoidal current is sent through a movingcoil galvanometer, the meter reads zero.如果将一正弦电流通入动圈式电流计, 那么这电流计的读数为零.Th...
中心力是由球对称的势能函数而来的力.A central force is one derived from a potential - energy function that is spherically symmetric.有心力是一种径向力,它的大小只取于离原点的距离.A central force is a radial force which depends only on the distance from the orig...
The utility model relates to a new honeycomb briquet moulding machine.本实用新型是一种新型的蜂窝煤成型机.a cell of a honeycomb蜂房But now the honeycomb board manufacturers often control bad quality problems often.但现在蜂窝纸板生产厂家往往因控制不好经常出现质量问题...