Matching: -A Device Built in to Some Heads That Assist the the Operator

Short Answer

Matching:
-A device built in to some heads that assist the operator in leveling the head. The operator levels the head by adjusting the support until the spirit level's bubble is perfectly centered.
A)Arc
B)Baby legs
C)Base
D)Cable guards
E)Camera operation
F)Camera setup
G)Cam head
H)Crab dolly
I)Crabbing
J)Cradle head
K)Crane
L)Crane up/down
M)Dolly
N)Dolly Grip
O)Floor Manager
P)Fluid head
Q)Follow Focus
R)Friction head
S)Head
T)Hi-hat
U)IFB
V)Lead Counter Weighted Studio Pedestal
W)Long Legs
X)Mounting Plates
Y)Mounting Wedges/Quick Release Shoes
Z)Olympian
Aa)Pedestal Up/Down
Bb)Peewee
Cc)Pneumatic studio pedestal
Dd)Riser
Ee)Shot sheet
Ff)Spider/Triangle
Gg)Spirit level
Hh)Spreader
Ii)Steadicam
Jj)Studio pedestal
Kk)Swish-pan
Ll)Tongue left/right
Mm)Titan/Nova
Nn)Tracking shot
Oo)Tripod
Pp)Truck
Qq)Wrap
Rr)Zeus
Ss)Zoom