下凹 [
xià āo]
concave-down(ward)
inferior fovea
fovea inferior
notching
- 引擎盖上上凸下凹,尽是些痕路。
Indentations up and down the bonnet. - 待在地形下凹的地方(但不是在海岸线附近,那里会被海水淹没的),躺下来,并且把任何你希望在飓风过后还能找到的东西绑好固定。
Stay below the Earth's surface, lie low, and tie down everything you wish to find when it's over. - 提出将流入量(从压料面下进入凹模型腔的局部材料线素长度)作为衡量局部成形阻力的指标。
It is pointed out that length of flown-in material (LFM), which flows into female die from underside of blank-holder during forming, is an external index of local forming resistance.