Drying up your damp crawlspace with crawlspace encapsulation is the first step towards a clean and healthy environment ready for living, storage, and play. Waters Basement Services can turn your musty, humid, wet crawspace into a bright order-free space.
The Rockwell hardness test is the most used and versatile of the hardness tests. For soft materials such as copper alloys, soft steel, and aluminum alloys a 1/16 diameter steel ball is used with a 100-kilogram load and the hardness is read on the B scale.
Mean Roughness. The Mean Roughness (Roughness Average Ra) is the arithmetic average of the absolute values of the roughness profile ordinates. Ra is one of the most effective surface roughness measures commonly adopted in general engineering practice.It gives a good general description of the height variations in the surface.The units of Ra are micrometres or microinches.a is one of the most effective surface roughness measures commonly adopted in general engineering practice. It gives a good general description of the height variations in the surface. The units of Ra are micrometres or microinches.