Bolt tensioners are devices designed to apply a specific tension to a bolt. The device may be either removed once the actual nut is threaded into place, or left in place, in the case of a hydraulic nut.
The metric system does away with all of the different units of volume used in the English system, and instead, uses only one unit to measure volume. That unit is called the liter. Materials Needed: Meter stick or metric ruler; stiff cardboard such as poster board; scissors or hobby knife; tape.
The Lung Volumes and Capacities Page! The volumes and capacities listed here are normally determined using a spirometer! A traditional bell spirometer is a canister of water with an inverted canister bell over it with air space inside the inverted canister bell.