Melamine plastic crockery is a copolymer of P (1) \( \mathrm{HCHO} ...
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Melamine plastic crockery is a copolymer of
P
(1) \( \mathrm{HCHO} \) and melamine
W
(2) \( \mathrm{HCHO} \) and ethylene
(3) Melamine and ethylene
(4) None of the above
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