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2. Concrete leveling - Wikipedia

   en.wikipedia.org/wiki/Concrete_leveling

   Even though the injection pressure is relatively low, compared to Foam Leveling, Stone Slurry Grout Leveling has a high compressive strength of 240 pounds per square inch. [4] This is equal to 34,560 pounds of lifting force per square foot. With Portland cement added, this can increase to over 6,000 psi [5] or 864,000 pounds per square foot ...

3. Level (optical instrument) - Wikipedia

   en.wikipedia.org/wiki/Level_(optical_instrument)

   The Y level or wye level is the oldest and bulkiest of the older style optical instruments. A low-powered telescope is placed in a pair of clamp mounts, and the instrument then leveled using a spirit level, which is mounted parallel to the main telescope. The term dumpy level (also builder's level) endures despite the evolution in design. They ...

4. Level staff - Wikipedia

   en.wikipedia.org/wiki/Level_staff

   Topographer's rods are special purpose rods used in topographical surveys. The rod has the zero mark at mid-height and the graduations increase in both directions away from the mid-height. In use, the rod is adjusted so that the zero point is level with the instrument (or the surveyor's eye if he is using a hand level for low-resolution work).

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6. Cost-plus pricing - Wikipedia

   en.wikipedia.org/wiki/Cost-plus_pricing

   Markup price = (unit cost * markup percentage) Markup price = $450 * 0.12 Markup price = $54 Sales Price = unit cost + markup price. Sales Price= $450 + $54 Sales Price = $504 Ultimately, the $54 markup price is the shop's margin of profit. Cost-plus pricing is common and there are many examples where the margin is transparent to buyers. [4]

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9. Levelling - Wikipedia

   en.wikipedia.org/wiki/Levelling

   The other standard method of levelling in construction and surveying is called trigonometric levelling, which is preferred when levelling "out" to a number of points from one stationary point. This is done by using a total station , or any other instrument to read the vertical, or zenith angle to the rod, and the change in elevation is ...