C) national? I'm sorry if I am wrong
Food-grade lubricants must perform the same technical functions as any other lubricant: provide protection against wear, friction, corrosion and oxidation, dissipate heat and transfer power, be compatible with rubber and other sealing materials, as well as provide a sealing effect in some cases.
Answer:
29 %
Explanation:
check the table for given condition and divide by total no of students
