The Rockwell Hardness test is a hardness measurement based on the net increase in depth of impression as a load is applied. Hardness numbers have no units and are commonly given in the R, L, M, E and K scales. The higher the number in each of the scales means the harder the material.
Apac. Apac is a town in Apac District, Northern Uganda. It is the 'chief town' of the district and the district headquarters are located there. The district is named after the town. see more on Definitions.net Â».
APAC 20 | APAC 31 | APAC 40 | APAC 44 | APAC 50 | APAC 51 | APAC 60 | APAC 65 | APAC 70 | APAC ENCapSealâ¢ | APAC V-Blockâ¢. APAC 20 is a concentrated acrylic primer used before installing self-leveling underlayments or topping materials on porous floor substrates.