词汇	PSDD
释义	PSDD preliminary system design description步系统设计描述
随便看	standard implicit method Standard impulse standard impulse current standard impulse voltage standard inbred standard incandescent lamp standard incidence Standard Incidence Ratio standard income statement standard indenter standard indetermination degree standard index standard indexing system standard index number formula standard index plate standard indicator standard inductance standard inductor standard industrial classification Standard Industrial Classification Code standard industrial classificationsic standard industrial classification sic Standard Industrial Code standard infinitesimal standard information