Ducts are fabricated of
a) sheet metal
b) cement asbestos
c) plastic
d) fibreglass
e) all of the above
Answer: E
Ducts are fabricated of
a) sheet metal
b) cement asbestos
c) plastic
d) fibreglass
e) all of the above
Answer: E
a) sheet metal
b) cement asbestos
c) plastic
d) fibreglass
e) all of the above
Answer: E