Web单项选择题. 滤线栅的几何特性叙述,错误的是(). A.栅比值(R)越高,消除散射线作用越好. B.密度值(n)大的吸收散射线能力差. C.铅容积P为栅表面上,平均l平方厘米中铅体积. D.f0称栅焦距. E.焦栅距离界限表示为f1~f2. 点击查看答案. 单项选择题. Web其中,K表示家用空调,F表示分体机(就是内外机分开的意思),R指热泵式(表示该空调能够制热,另Rd表示电热式,创维暂时还没开发),35表示功率,G表示壁挂机,W表示是外机(N就表示内机,一般用外机表示空调型号),V代表变频,最后的-3表示3级能效 ...
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