back and front pitch of a winding

geometrical pitch of a propeller

thread pitch of a screw

section a-a a-a

A-A-A conjugation structure

S-A(A-A) missile

A.A.A.

(of a girl) find a sugar daddy

10 of a peck

22 nd day of a month

24 th day of a month

26th day of a month

27th day of a month

3-D Design of a Centrifugal Pump

A Beacon out of a Crossroad

a breakdown for lack of a phase

a child of a union of concubinage

A contingent plan of a fire in hospital

a decade of a century

A Diary of a Writer