缩成皱状 corrugate ; corrugating

皱状沟铸型 ruffled groove cast

箱状褶皱 box fold ; flat topped fold ; box-like fold

扇状褶皱 fan fold ; fan-shaped fold

阶状褶皱 echelon fold ; step fold ; echelon folds

肠状褶皱 [地质] ptygmatic fold ; [地质] ptygma

线状褶皱 linear fold

橘皮状表皮皱摺 surface roughening

脊状褶皱 carinate fold ; ridge-like fold

穹状褶皱 dome shaped fold ; dome fold