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Divisions made of steel or equivalent material, suitably stiffened and capable of preventing the passage of smoke and flame up to the end of the first 1 hour of the standard fire test.
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Related Terms |
PORCUPINE BOILER
A boiler having dead end tubes projecting from a vertical shell.
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PIKE POLE
1. A pole with a sharp metal point in one end that is used to hold utility poles upright while they are being installed. 2. See fire hook.
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PICKHAMMER
[DESENG] Ahammerwithapoint at one end of the head and a blunt surface at the other end.
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NICHOLSON'S HYDROMETER
A modification of Fahrenheit's hydrometer in which the lower end of the instrument carries a scale pan to permit the determination of the relative density of a solid.
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NAILHEAD
Flat protuberance at the end of a nail opposite the point.
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MULTIPLE CARTRIDGES
Filter medium made up of two or more filter cartridges, either fastened end to end or arranged side by side (in series or parallel flow respectively).
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MOUTH
[ENG ACOUS] The end of a horn that has the larger cross-sectional area.
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MOUSETRAP
A cylindrical fishing tool having the open bottom end fitted with an inward opening valve.
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MERCURY BAROMETER
An instrument which determines atmospheric pressure by measuring the height of a column of mercury which the atmosphere will support; the mercury is in a glass tube closed at one end and placed, open end down, in a well of mercury. Also known as Torricellian barometer.
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M-DESIGN CORE BARREL
A double-tube core barrel in which a 21/2 -taper core lifter is carried inside a short tubular sleeve coupled to the bottom end of the inner tube, and the sleeve extends downward inside the bit shank to within a very short distance behind the face of the core bit.
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