The neutron pulses are acquired by a rotating chopper, which is a plate made up of a sheet cadmium sandwiched in between two sheets of stainless steel.

脉冲中子束由机械选择器产生，选择器是一个由两片不锈钢中间夹一镉片构成的高速转盘。

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The utility model can reduce the torque required for rotating the cutter head through changing the direction of working face of grass chopper blade.

本实用新型通过改变铡草刀的刀刃所在面的方向，从而降低刀盘旋转需要的扭矩。

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