concavo-concave

adj.

两凹的，两面凹洼的；凹凹；

Metallization to improve electromigration resistance by etching concavo-concave opening
Cournot Oligopoly and Concavo-Concave Demand
Test and analysis for ZQJ-40 concavo-concave roller correcting unit
Method of forming contact openings having concavo-concave shape
ZnO Well-Faceted Fibers with Periodic Junctions
Read-only optical disc and method of manufacturing a read-only optical disc
[Nuclear-cytoplasmic ratio and shape of erythroid cells of the reindeer embryo]
Focus-adjustable optical assembly
Patterns of population industrial structure and their alterations
Christian Ewerhart