The weights of paper used for coated abrasive backings are designated by letters A, C, D and .

The weights of paper used for coated abrasive backings are designated by the letters A, C, D and E

Explanation:

The letter designation of the weights of paper backings for different applications are;

'A' Weight - Paper meant for use in finishes in abrasive projects. The paper is light (weight) touch grade of abrasive paper

'C' Weight - The 'C' designated paper is the medium light grade which offers more strength and bendability and it is suitable for woodwork by a cabinet maker

'D' Weight -  The 'D' weight category is a medium heavy paper

'E' Weight - The 'E' weight category is a strong paper category, used for discs, coarse sheets, and belts

Therefore, the letters A, C, D and E are used to designate the weights of paper used for coated abrasive backings.

oil flow is a highly convective flow compared to water flow at normal temperature and pressure.

answer:

explanation:

assault rifle is a rapid-fire, magazine-fed rifle designed for military use. it is a shoulder-fired weapon that allows the shooter to select between semi-automatic (requiring you pull the trigger for each shot), fully automatic (hold the trigger and the gun continuously fires) or three-shot-burst modes.