How to pronounce 鋁合金 in Cantonese (3 out of 6):

主要都是用鋁合金打造
They're mostly made of aluminum.

Cantonese Sentence Breakdown

主要 zyu2 jiu3
mainly
dou1
all
both
entirely
(used for emphasis) even
already
(not) at all
metropolis
capital
big city
the whole
elegant
refined
without exception
also
too
still
used in a sentence to add an inference or interrogative tone
si6
is
jung6
to use
to employ
to have to
to eat or drink
expense or outlay
usefulness
hence
therefore
to apply
to operate
function
to spend
to make use
to serve as
to eat
to drink
with
to need
to exert
effect
with this
鋁合金 leoi5 hap6 gam1
aluminum alloy
打造 daa2 zou6
to create