fruit fly [=pomace fly]

Syrphid-fly or hover-fly

distance-true fold (concentric fold)

FOLD ON FOLD

head fold-Cephalic fold

Ⅱ fly ash

a fly in amber

a fly in the ointment

a fly on the wheel

abnormally high content of carbon in fly ash

Activated Fly Ash

Active fly ash

actived fly ash

Activity of Fly Ash

adding volume of fly ash

Adding-Calcium Fly Ash

admixture-fly

aggregate stabilized by lime and fly-ash

aggregate stabilized by lime and fly-ash(ASLF)