To Ensure realization of those parameters, criteria for designing, manufacturing and testing of spherical mirror and back projection screen of this system are discussed.

本文重点介绍了WIDE系统的设计原则和技术指标的确定，以及为保证指标的实现，确定球面反射镜和后投影屏设计、制造和检测指标。

youdao

It had to be put together from half a dozen towns, a church from here, a school from there, supplemented with mock-ups, masking mattes, blue- and yellow-screen and back-projection.

ECONOMIST: Robert Boyle