|
Which one of the following polymers is used for making bulletproof windows? |
|||
|
(a) |
Polycarbonates |
(b) |
Polyurethanes |
|
(c) |
Polystyrene |
(d) |
Polyamides |
|
Which one of the following polymers is used for making bulletproof windows? |
|||
|
(a) |
Polycarbonates |
(b) |
Polyurethanes |
|
(c) |
Polystyrene |
(d) |
Polyamides |