bulk shielding facility是什么意思

用法例句

This paper discussed severed issues related with selecting materials and computing the shielding factor for designing and manufacturing a large size shielding device which works on ultra - low frequencies ( 0 - 300Hz).

本文对一种工作在超低频(DC-300Hz)范围的大尺寸屏蔽装置所用屏蔽材料的选择,屏蔽系数计算的相关问题进行了探讨,概述了屏蔽装置结构设计,制造过程的重点注意事项,据此研制成功一种屏蔽度达75-90dB的超低频屏蔽装置。