concave arc length [农机] 凹板弧长
concave arc bottom 凹圆弧底
size of workpiece's concave arc 工件凹弧尺寸
one-fourth concave arc milling cutter 四分之一凹圆弧铣刀
When the fluidized bed is in the structural style of a supporting plate and an air bag, the supporting plate can be a concave arc.
流化床为支撑板加气囊袋结构形式时，支撑板可为凹弧形。
The utility model relates to forceps, ends of two clamping handles of which are respectively provided with corresponding concave arc clamping jaws.
本实用新型涉及一种镊子，该镊子的两个夹柄的端部分别设置有相互对应的凹弧形夹爪。
On the base of Hertzian stress theory we developed a new kind of disk CAM mechanism whose follower has concave circle - arc bottom.
根据赫兹应力理论，提出了一种从动件接触面形状为凹圆弧底的新型盘状凸轮机构。
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