2. The mask origin
since the primitive
age.
They used it for
religious observance
and the mask shows
what people believe.
Ex. Animal, god, and
etc.
8. An oxygen mask pro
vides a method to tr
ansfer breathing
oxygen gas from a
storage tank to the
lungs.
Ex. Medical
Ambulance Car
9. A gas mask is a
mask worn over the
face to protect the w
earer from inhaling
quot;airborne pollutantsquot;
and toxic gases.
Ex. Fire-fighter
Soldiers
10. Masks that using
when go to ski. Or
when people take
over the
Market ,convenience
store, and etc.
Ex. Ski
Robbing