plano-concave

常见例句

plano concave lens
平凹透鏡,球平麪凹透鏡
plano concave
adj. 平麪平一麪凹的(平凹的)
His figure looks very funny in the concave mirror.
他的樣子在凹鏡裡顯得非常可笑。
An indented or concave surface or area.
凹陷，窪地凹的表麪或地區
Just as a double convex lens enlarges, so a double concave lens reduces.
正象雙凸透鏡可以放大那樣，雙凹透鏡也可以縮小。
A concave molding with a cross section that approximates a quarter circle.
飛簷的凹圓線腳截麪近於九十度弧的凹線腳