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Glass relocking device A glass relocking device is a piece of glass, usually tempered, placed where it might be expected to break in a burglary attack. It is attached, usually with wires, to one or more spring-loaded bolts, which are often randomly located. A drill or torch may break the glass, releasing the bolts. Key cut
Prior to the invention of the Welch plug, the core holes were sealed using pipe plugs. During the testing of a car, one of the pipe plugs backed out. In order to get back on the road, one of the Welch brothers installed a press-fit quarter or half dollar coin into the hole using a hammer. The design of the Welch plug was refined based on this ...
A termite shield is a sheet metal fabrication used in light frame construction to reduce the movement of termites from the soil into wood framing members such as floor joists and studs. [1] Although there are several types of non chemical termite barriers now in use, termite shields are the original.
Gauge glass part of the water level gauge, which normally consists of a vertical glass tube connected top and bottom to the boiler backplate. The water level must be visible within the glass at all times. [3] Grooving erosion of a boiler's plates from the internal water space, particularly where there is a step inside the shell.
Elevators and other rooms with metallic conducting frames and walls simulate a Faraday cage effect, leading to a loss of signal and "dead zones" for users of cellular phones, radios, and other electronic devices that require external electromagnetic signals. During training, firefighters and other first responders are cautioned that their two ...
But stay-at-home husbands (like episode host Jason Momoa) can still keep the house clean with such appliances as a dishwasher with a 70-pound steel door, a washing machine 6 feet in height, and a 240-horsepower riding lawnmower-like vacuum cleaner with a stain remover that looks and acts like a jackhammer. [276]