1.

Temperature and gage pressure maintained during the manufacture of hot SBR (styrene butediene rubber) are

A. 50°C and 3 - 4 kg/cm2
B. 50°C and 1 kgf/cm2
C. 250°C and 10 kgf/cm2
D. 250°C and 1 kgf/cm2
Answer» B. 50¬∞C and 1 kgf/cm2


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