Materials and Construction
Plastics are

All of these
Not suitable for drainage pipe manufacture
Used in very high temperature applications
Non-biodegradable

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Materials and Construction
Aluminium alloy is one of the most suitable materials of construction for aircrafts mainly due to its

High strength to weight ratio
Its ability to be cast, rolled, forged & stamped
High strength and corrosion & oxidation-resistance at elevated temperature
Low temperature strength properties

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